- Reverse an Array
- Maximum and Minimum Of Array Elements
- Sum Of Digits
- Pascal Triangle
- Factorial
- Sum of Array
- Number of factors
- Leap Year
- Palindrome String
- Armstrong Numbers
- Prime Number
- LCM And GCD
- Multiply 2 matrices
- Sum of Series
- Series AP
- Binary number to decimal number
- Sum of Digit is Pallindrome or not
- Automorphic Number
- Fascinating Number
- Rearrange Array Alternately
- Remove Spaces
- Value equal to index value
- Decimal to any base conversion
- Swap kth elements
- Second Largest
- Number of occurrence
- Cube root of a number
- Sum of Digits Multiple - copy
- Multiples Power
- At least two greater elements
- Find difference between sum of diagonals
- Count of smaller elements
- Split Strings
- Even Odd Sum
- Sum of diagonals
- Extract the integers
- Front-Back Transformation - copy
- Check if two given circles touch each other
- Full Prime
- Program to print reciprocal of letters - copy
- Multiply Matrices

Name

Andrey Khayrutdinov

Institution

Overall Coding Score: 4748

Monthly Coding Score: 14

Weekly Coding Score: 0

- Maximum Occuring Character
- Binary String
- Consecutive elements
- GCD of Array
- Count Odd Factors
- Repetitive Addition Of Digits
- Searching a number
- Power of 2
- Series GP
- 2's Complement
- Sort The Array
- Pythagorean Triplet
- Nth Fibonacci Number
- Sort a String
- Strong Number
- Weird Number
- Print the Kth Digit
- Doubling the value
- Sieve of Eratosthenes
- Shortest path from 1 to n
- Amend The Sentence
- Count possible triangles
- Dice throw
- Rotate Array
- Permutations of a given string
- Parity of unsigned integer
- Check if the number is Fibonacci
- Missing number in array
- Rock Paper Scissors!
- Array of alternate +ve and -ve no.s
- Swap two nibbles in a byte
- Maximum product of two numbers
- Number of paths
- Boolean Matrix Problem
- Numbers containing 0's from 1 to N
- Frobenius coin problem
- Segregate Even and Odd numbers
- Count total set bits
- Number is sparse or not
- Bit Difference
- Count numbers containing 4
- Convert from any base to decimal
- Reverse sub array
- Odd Divisors
- Greater on right side
- Count zero
- Perfect Squares in a Range
- nth digit of Fibonacci
- Sum of distinct elements
- Intersection of two arrays
- Union of two arrays
- Convert array into Zig-Zag fashion
- Remove character
- Perfect Cubes in a Range
- Point lies or not
- k largest elements
- Pairs of prime number
- Minimum difference pair
- Remove recurring digits
- Evaluate the x + a = b statement
- Find position of set bit
- Jumping Geek
- Sum of Digits Divisibility
- Palindromic Subsequences
- Ways To Tile A Floor
- Absolute distinct count
- Generate Binary Numbers
- Shortest direction
- Smallest number
- Factorial Number
- Count the numbers
- Find the Odd Occurence
- Find the remainder
- Angle between hour and minute hand
- Sum of large numbers
- Keypad typing
- Euler Totient Sum and Divisors
- Generate binary string
- Total distance travelled in an array
- Divide the number
- Sum of Products
- LCM of given array elements
- Extraction of secret message
- Even occurring elements
- Missing ranges of numbers
- Help the Old Man!!!
- Punish the Students
- Who Will Win?
- Base Conversion
- Total count
- Compare two Large Numbers
- Surpasser Count
- Product of Complex Numbers
- How many pizzas ?
- Matchsticks game
- Sum of primes
- Merge and Sort
- Minimize string value
- Rotate by 90 degree
- Rearranging array
- The AND Gate
- Maximum Area
- The OR Gate
- Multiple in Table Tennis
- 1's Complement
- Good String
- Mega Sale
- 3 Divisors
- Set Bits
- Prime Factors
- Repeated sum of digits
- Subset Sums
- Longest Consecutive 1's
- Different ways to Spell a Number
- Sum of divisors
- Count Squares
- Square Divisors
- Nth Even Fibonacci Number
- Count Sorted Rows
- Sum of Consecutives
- Disarium Number
- Pairs with given XOR
- Padovan Sequence
- Juggler Sequence
- No of Carry Operations
- Distance and Displacement
- Elements before which no element is bigger
- Minimize the sum of product
- Convert floating point to natural number
- Make a Distinct Digit Array
- Chocolate Distribution Problem
- Reverse each word in a given string
- Demonitisation
- Check if a number can be expressed as x^y
- Permutations in array
- String with numbers at its end
- Interesting Patterns
- Starting Point
- Help a Thief!!!
- Encrypt the string - 1
- Replace the Bit
- Sum of product of x and y with floor(n/x) = y
- Form a Triangle
- Largest subarray with GCD one
- Squares in a Matrix
- Flying Jet
- Metro Problem
- King's War
- Check squares
- Help Joey
- Find first and last occurrence of x
- Type of array
- Ladoo problem
- Sum of dependencies in a graph
- Stuffs Division
- Sort in specific order
- Check if two arrays are equal or not
- Sherlock a Detective
- Invert the Bits
- Check if divisible by 11
- Lucky Number-2
- Unique Numbers
- XOR of all elements
- Check if divisible by 4
- Long Long Decimal
- Learning Output
- Substrings with similar first and last characters
- Sum of all substrings of a number
- Rahul lucky-unlucky
- India's unique railway track
- Count rotations divisible by 4
- Find the nth number in the sequence
- Check if divisible by 36
- Binary fraction to decimal
- Find first set bit
- Minimize sum of alternate product
- Find the safe position
- Check for subsequence
- Check if the door is open or closed
- Find first repeated character
- Count even substrings
- Magical Number
- Message decoding
- Geek and Coffee Shop
- A guy with a mental problem
- Fake Profile
- Check if divisible by 5
- Wrong Ball
- Magical String[Duplicate Problem]
- The Muskteers
- Index of first 1 in a sorted array of 0’s and 1’s
- Strong Numbers
- Sherlock and his Enemies
- Does array represent Heap
- Missing number in shuffled array
- Thief trying to escape
- Another Matrix Game
- Last index of One
- Arranging the array
- Tracks
- First element to occur k times
- Check whether K-th bit is set or not
- Length of Last word
- Extract Maximum
- Remove Duplicates from unsorted array
- Uncommon characters
- Minimum sum of two elements from two arrays
- Sum of numbers in string
- URLify a given string
- Multiple of X closest to N
- Print first letter of every word in the string
- Reverse a string with spaces intact
- Rotate Bits
- Count number of words
- Find Smallest Missing in Sorted
- First Digit
- Wildcard string matching
- Sorted matrix
- Determinant of a Matrix
- Minimum move to front operations
- Sum Terms Nth Row
- Smallest power of 2 greater than or equal to n
- Balance with respect to an array
- Gray to Binary and Binary to Gray
- Pair array product sum
- Pair cube count
- Equivalent Sub-Arrays
- Evaluate the expression
- All numbers with specific difference
- Count pair sum
- First Come First Serve
- K-th distinct element
- Friendly Array
- Max Odd Sum
- Swap and Maximize
- Max Sum Subarray of size K
- Minimum Difference among K
- Longest Equal Prefix
- Check Arithmetic Progression
- Line passing through 2 points
- Sort the Half Sorted
- Partition Point in the Array
- Fibonacci in the array
- Alternative Sorting
- Rightmost different bit
- Count numbers divisible by M
- Max value after m range operation
- Check set bits
- Set kth bit
- Sorting Employees
- Count Pairs Odd Xor
- Break Numbers[Duplicate problem]
- First Digit of Product of Numbers
- Make a Palindrome
- Quick Left Rotation
- Total digits
- Difficulty of sentence
- Toggle bits given range
- Stable Sort and Position
- Twice counter
- Shuffle integers
- Longest Common Prefix in an Array
- Elements in the Range
- In First But Second
- Distinct Adjacent Element
- Adam Number
- Min value of x
- First K natural numbers
- Print first n Fibonacci Numbers
- Sum of distinct elements for a limited range
- Count triplets with sum smaller than X
- Linear Diophantine Equations
- Check perfect square
- Odd to Even
- Minimum number of flipped bits
- Total number of Strings
- GCD, LCM and Distributive Property
- Minimum Distinct Ids
- Find the Highest number
- Minimum sum of factors
- Product Sum
- Print Matrix in snake Pattern
- Twisted Prime Number
- Check a Integer is power of 3 or not
- Change all even bits in a number to 0
- Lucky number and a sum
- Anagram Palindrome
- Carol Number
- Count digits in given number N which divide N
- Closest Number
- Transform to prime
- First and last occurrences of X
- Positive and negative elements
- Boolean String Value
- Equalization of an array
- Empty The Tank
- Just One Mismatch
- Finger Game
- Smallest number repeating K times
- Find the position of M-th item
- String Subsequence Game
- Rearrange the array
- Part Sort
- Ceil The Floor
- Sort first half in ascending and second half in descending
- Maximum weight difference
- Tough Competitors
- Anshuman's Favourite Number
- Number of unique rectangles
- The Counting Game !!
- XOR Count Zero and One
- Repated Sum and then Multiply
- Absolute Difference of 1
- Maximum number of unique prime factors
- Remove common characters and concatenate
- Powers game
- Numbers having two adjacent set bits
- Shortest un-ordered subarray
- Swapping Triangles
- XOR Game
- Longest increasing subarray
- Make the hit in power game !
- Sums of i-th row and i-th column
- Prime Palindrome Sum
- Repeated I.Ds
- Binary representation of previous number
- Left Rotate Matrix K times
- Count number of digits after decimal
- Rectangle Number
- Rotate Page
- Sum of Digit Modified
- Count the characters
- Binary representation of next number
- Find k-th character in string
- Good or Bad string
- Finding Dory
- Repeated Character
- Find the position
- Numbers having alternate bits
- Red OR Green
- Sort String
- First and last Bit
- Maximize OR
- Difference between highest and lowest occurrence
- Minimum product pair
- Product of factors of number
- Find unique element
- An Easy problem
- Sum of first n terms
- Generate all cyclic permutations of a number
- Find the fine
- Three distinct factors
- Rearrange string as alternate x and y occurences
- Number of compositions of a natural number
- Smallest K digit number divisible by X
- Count the numbers satisfying (m + sum(m) + sum(sum(m))) equals to N
- Minimum Product of k Integers
- Maximize ∑arr[i]*i of an Array
- One's Complement
- Akash and Friend
- Set the rightmost unset bit
- The Cycle Game
- Three Number Even Sum
- Biggest integer having maximum digit sum
- Sort the string in descending order
- Find N-th term in the series
- Sum of Digits Prime/Non-Prime
- Sum of all subsets formed by first N natural numbers
- Count number of elements between two given elements in array
- Remove all characters other than alphabets
- Ishwar and his proposals
- Weak Maths
- Stuti and her Problem
- Find the closest number
- Sandwiched_Vowels
- Even-Odd turn game
- Narcissistic number
- Finding-Pairs
- Series X1
- Minimal Summing Up
- Last index of a character in the string
- Distinct Elements in a Stream
- Make Co-prime Array
- Special Series Sum
- Pattern for Reverse Character Bridge
- Check for three consecutive numbers
- Maximize the volume of Cuboid
- Special Odd Series Sum
- Maximum triplet sum in array
- Print K smallest elements in their original order
- Check whether two numbers differ at one bit position only
- Floating point number even or odd
- Break the digital root code
- Squares Difference
- Semi Prime
- Factors Sum
- Check if the number is balanced
- Count the characters in each word in a given sentence
- Find sum of even factors of a number
- The problem of identical arrays
- Count number of equal pairs in a string
- Number of positive integral solutions
- Numbers having alternate bits in range 1 to n
- Extract the phone number
- Human and the tower
- The Remaining Cake
- Tiger Zinda Hai
- Product is even or odd?
- Remove consonants from a string
- Earthquake and the Paint Shop
- C++ Basic Data types
- C++ Nega Bit
- Check if actual binary representation of a number is palindrome
- Compare two fractions
- C++ Corresponding position in the two strings that hold exactly the same characters.
- Winner of an election where votes are represented as candidate names
- Palindrome in both Decimal and Binary
- Most frequent word in an array of strings
- Sophie Germain Prime
- Reading books
- Encoding names
- Crazy String
- Set all odd bits
- Message Spreading
- Convert the string
- Making elements distinct
- C++ Function Overloading
- C++ Sets
- Azad and Chocolates
- The amazing number
- Sum of all sub-sequences of a number
- Last duplicate element in a sorted array
- Sum of f(a[i], a[j]) over all pairs in an array of n integers
- Inverse Permutation
- Game with nos
- Play With OR
- Why is Melody so chocolaty?
- Tywin's War Strategy
- Ishaan's Internship
- Ishaan Loves Chocolates
- Cricket Average
- Midori and chocolates
- Ishaan's Sum Problem
- Ishaan's Weight
- Dull Jack
- Chocolate lengths
- Factor OR Multiple
- Jay's Apples
- Lottery Money
- Program for length of the longest word in a sentence
- String of Commons
- Riya's Test
- Strange Sort - copy
- Number Series
- Part of it.
- GOT TV series
- The Number System
- Confused pappu
- Difference series
- Reducing Walls
- Find the Number which contain the digit d
- Gray Code
- Gray to Binary equivalent
- Maximum Perimeter of Triangle from array
- Doctors Clinic
- How Many X's?
- Prime String
- Height of Heap
- Fibonacci to N
- Average Count Array
- The Spider Steps
- Java Anagram Strings
- Java Date and Day
- Java Collection | Set 1 (ArrayList) Part-1
- Java Collection | Set 3 (HashMap) Part-1
- Java 1-d and 2-d Array
- Java Iterator
- C++ 2-D Arrays | Set-2
- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Power of Four
- Delete node in Doubly Linked List
- Size of Binary Tree
- Inorder Traversal
- Bubble Sort
- Count Leaves in Binary Tree
- Selection Sort
- Height of Binary Tree
- Finding middle element in a linked list
- Circular Linked List
- Postorder Traversal
- Implement Stack using Linked List
- Implement stack using array
- Implement Queue using Linked List
- Implement Queue using array
- Square root
- Insert a node in Doubly linked list
- Binary Search
- Remove duplicate elements from sorted Array
- Add two fractions
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Largest product
- Convert to Roman No
- Preorder Traversal
- Implement strstr
- C++ STL | Set 1 (vector)
- C++ STL | Set 3 (map)
- C++ STL | Set 4 (stack)
- C++ STL | Set 5 (queue)
- Middle Pattern
- C++ STL | Set 6 (set)
- Search a node in BST
- Equal Sum and XOR
- C++ STL | Set 7 (unordered map)
- C++ STL | Set 8 (unordered set)
- Smallest divisible number
- Remainder with 7
- Java Collection | Set 4 (TreeMap)
- Implement Atoi
- Java Collection | Set 5 (LinkedHash Set)
- Find Number of Numbers
- Minimum distance between two numbers
- Find triplets with zero sum
- Operating an array
- Linked List Insertion
- Operating a sorted array- copy
- Play with an array
- Minimum element in BST
- Anagram of String
- Circular Linked List Traversal
- Linked List Length Even or Odd?
- Delete Alternate Nodes
- Identical Linked Lists
- Find the Sum of Last N nodes of the Linked List
- Modular Node
- Find n/k th node in Linked list
- Maximum in Struct Array
- Queue Reversal
- Triplet Family
- Sum of Binary Tree
- Magical Number
- Insert in Middle of Linked List
- longest substring containing '1'
- Pairwise Consecutive Elements
- Nth Multiple
- Count Non-Leaf Nodes in Tree
- C++ STL List
- C++ STL Deque
- C++ Classes Introduction
- Mrs. S- JAVA Bits Set 1
- Product of array elements
- C++ Inheritance introduction
- C++ Call by reference
- Java Interface
- Java Collections | Set 8 (TreeSet)
- Java Generic Class
- Java Collections | Set 9 (Queue)

- Frequency of Array Elements
- Anagram
- Adding One
- Maximum Gap
- Pattern Searching
- Print Pattern
- Rotation
- Search in a Rotated Array
- Parenthesis Checker
- Rectangles in N*N Board
- Squares in N*N Chessboard
- Palindrome numbers
- Subarray with least average
- Merge Two Sorted Arrays
- Magic Number
- Maximize Toys
- Large Factorial
- Trailing zeroes in factorial
- Maximize Number of 1's
- Non Repeating Character
- a^b(Set 2)
- Minimum number of Coins
- Distinct Substrings
- Sum of Middle Elements of two sorted arrays
- Good Pairs
- First Repeating Element
- Count Occurences of Anagrams
- Forming Rectangle
- Reverse words in a given string
- Isomorphic Strings
- Count Substrings
- Check if a given string is a rotation of a palindrome
- Move all zeroes to end of array
- Remove all duplicates from a given string
- Activity Selection
- Remove “b” and “ac” from a given string
- Majority Element
- Equal Sum and Product
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Pairs with difference k
- Subset Sum Problem
- Two numbers with sum closest to zero
- Number of Coins
- Finding Number
- Stock buy and sell
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Next sparse binary number
- Amount of Water
- Single Number
- Segregate even and odd nodes in a Linked List
- Does robot moves circular
- Count increasing Subarrays
- Element that appears once where every element occurs twice
- Longest Distinct characters in string
- Count distinct pairs with difference k
- Replace by X
- Is Square
- Column name from a given column number
- Maximum Product Subarray
- Let's Go Shopping!
- N meetings in one room
- Remove minimum elements
- Maximum of all subarrays of size k
- Remove Duplicates
- Kth distance
- Addition of submatrix
- Maximum sum increasing subsequence
- Array to BST
- Sum of two numbers represented as arrays
- Facing the sun
- Triangular Number
- Max Sum without Adjacents
- Common elements in three arrays(error)
- Arrange Balls
- Make Number Odd
- Key Pair
- Inversion of array
- Maximum Difference
- Add Binary Strings
- Product array puzzle
- Length Unsorted Subarray
- Multiply two polynomals
- Reverse Bits
- Count Smaller elements
- Lucky Number
- Swap bits
- Reach the Nth point
- Subarray with given sum
- Adjacents are not allowed
- Maximum repeating number
- Count numbers
- Stock span problem
- Leaders in an array
- Pair in array whose sum is closest to X
- Swap all odd and even bits
- Overlapping Substrings
- Max rope cutting
- Count number of hops
- Type of input
- Fun With Expresions
- Increment
- Count pairs with given sum
- Inorder Traversal and BST
- Save Knights
- Cycle Race
- Number of Days
- Special Number
- Where Am I ?
- Mapped String
- Cutting Rectangles
- AND operation
- Filling Bucket
- Minimum Value Assigned
- Copy Set Bits in Range
- Triplet Sum in Array
- Comment Removal
- Poisioned Sweet
- Two Repeated Elements
- Three Great Candidates
- K closest elements
- Minimum Possible Fruits
- Dearrangement of balls
- Reach a given score
- Next in Series
- Rectangles in a Circle
- Squares in Reactangle
- Sum of GCDs
- Moving on grid
- Possible paths
- Number of pairs
- Minimum element in a sorted and rotated array
- Search in a matrix
- Value of polynomial
- Maximum Collatz sequence length
- Faithful Numbers
- Max sum submatrix
- Fibonacci Sum
- Cross character
- Cross the Bridge
- Day of the week
- Largest power of prime
- Number of 1's in smallest repunits
- Chinky and diamonds
- Fraction Game
- Number of subsets and mean
- Shop in Candy Store
- K-Pangrams
- Check If two Line segments Intersect
- Largest number possible
- Sub-Array Pairs
- Arrange the Balls
- Pick values
- Missing element of AP
- Count the Zeros
- Factorial Pairs
- Distinct absolute array elements
- 0 - 1 Knapsack Problem
- Good Numbers
- Longest Common Increasing Subsequence
- Maximum Number of 1s
- Pangram Checking
- Integral Points In Triangle
- Pangram Strings
- Count number of disjoint subsets
- Trail of ones
- The Prime Twins
- Find the number of sub-arrays having even sum
- Skip the work
- Pallindrome Patterns
- Valid Substring
- Count the Reversals
- Diamond and Bags
- Tom and Jerry
- Left Most Digit of a product
- Right most non zero digit
- Last Match
- Greater power
- Special array reversal
- Next Prime Palindrome
- Maximum value K
- Extract the Number from the String
- Digit multiplier
- Number of ways to find two numbers
- Interesting Prime Numbers
- Cutted Segments
- Lexicographically previous permutation
- Smallest number subset
- Number of Heads
- Minimum number of swaps needed
- Permutations and Sum
- Number of Factors of n!
- Number that are not divisible
- Number of distinct subsequences
- Maximum average subarray
- Game of Death in a circle
- Division Problem
- Fraction Trouble
- Help Mommy out
- Power of Numbers
- Examination Papers
- Next larger element
- Class Average
- Gifts! Gifts! Gifts!
- Minimum Notes Required
- Final Destination
- Divisible Numbers
- Repeating GCD
- Permutation divisibility
- Nearest Power
- Ball coloring
- Arithmetic Number
- Left out candies
- Perfect Numbers
- Count digits in a factorial
- Subtraction and two numbers
- Recursively find sum of digits
- Ordering of strings
- Area of intersection of two circles
- Sachin's love for runs
- Change Bits
- Count number of substrings
- Crack the series
- Maximum value
- Raju and coins
- Largest number with given sum
- Number of matches
- GCD and Fibonacci Numbers
- Squares and divisibility
- Non Fibonacci Number
- Nth digit in sequence
- Collection of pens
- Number of solutions
- The Nth Fibonnaci
- Product of two digit numbers
- Magic numbers
- Permutation with Spaces
- Element appearing once
- Equilibrium point
- Floor in a Sorted Array
- Buildings receiving sunlight
- Finding Profession
- RegEx matching
- Maximize Dot Product
- Kth boom number
- Max value
- Flip Bits
- Letter Writer
- Missing number in matrix
- Helping Meesa
- Faulty Keyboard
- Finding the numbers
- Sort by Set Bit Count
- Optimal walk
- Minimum Energy
- Number of digits
- Count Increasing Subsequences
- Least Prime Factor
- Left or Right Positioned Array
- Collecting Trees
- Number Game
- Happy Number
- Maximize sum after K negations
- Max and Min Products
- LCS with permutations
- Game of cells
- Time Difference
- Modified Fibonacci
- Choose and Swap
- Euler Totient
- Geometric Progression
- Equal 0, 1 and 2
- Max Length Removal
- Adding Ones
- Min Number of Flips
- Kaprekar Number
- Keith Number
- Lucas Number
- Pairs with specific difference
- Deficient Number
- Dr. Strange's powers
- Mr. Binary
- Equal Point in Sorted Array
- Find Maximum Sum Strictly Increasing Subarray
- Circle and Lattice Points
- Largest Even Number
- Count Pairs in an Array
- Find (a^b)%m
- Sphenic Number
- Sum of elements between k1'th and k2'th smallest elements
- Circular Prime Number
- Min sum formed by digits
- Min Subsets with Consecutive Numbers
- Move all negative elements to end
- String Manipulation
- Minimum Steps
- Sonam Gupta and her Boyfriend
- Help Nobita
- Maximum 0’s between two immediate 1’s
- Coverage of all Zeros in a Binary Matrix
- Binary Tree K level sum
- Recursively remove all adjacent duplicates
- Exit Point in a Matrix
- Maximum Sum Bitonic Subsequence
- 1[0]1 Pattern Count
- Knapsack with Duplicate Items
- Special Factorial Number
- Make Zeroes
- Let's Play!!!
- Sum of k smallest elements in BST
- A Game of 2
- Find sum of divisors
- Smallest factorial number
- Make it Colorful
- Last non-zero digit in factorial
- Reverse Coding
- Flood fill Algorithm
- Tom and String
- Save The Nation
- Pair with greatest product in array
- Encrypt the string - 2
- Kth Prime factor of a Number
- Decode the pattern
- Longest K unique characters substring
- Roman Number to Integer
- Largest Product Pallindrome
- Last two digit Fibonacci
- Maximum no of 1's row
- Drive the car
- Friends Pairing Problem
- Decode the string
- Max sum in sub-arrays
- Next Greater Even Number
- Gold Mine Problem
- Smallest subarray with sum greater than x
- Odd Game
- Rahul a Geek
- Sharing
- Seeds of a number
- Game of XOR
- Find Nth root of M
- Find largest word in dictionary
- Learn Geometry
- Trace Path
- Love For The Twins
- Recaman’s sequence
- Minimum Operations
- Equal point in a string of brackets
- Find all pairs with a given sum
- Check if frequencies can be equal
- Shortest distance in infinite tree
- Largest zigzag sequence
- Palindromic patitioning
- Meta Strings
- Siri and her new College
- Numbers with same first and last digit
- Check if palindromic ignoring spaces
- Rahul and his Villa
- Temple Offerings
- Sid and his prime money
- Matrix Game - 1
- Jon and string
- Race in Fooland
- Excel Sheet | Part - 2
- Find the element that appears once in sorted array
- Zero Sum Subarrays
- Geeky Year
- Smallest window in a string containing all the characters of another string
- Playing with mobile numbers
- Find the string in grid
- Counting number of sentences and words in text
- Largest Fibonacci Subsequence
- Theft at World Bank
- Increasing Sub Sequence
- What is a Syllable ?
- Longest Palindromic Subsequence
- Fractional Knapsack
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Maximum difference Indexes
- Count subsets having distinct even numbers
- Common elements
- Recursive sequence
- Rod Cutting
- Print an array in Pendulum Arrangement
- Decreasing Sequence
- Fill array with 1's
- Subset with no pair sum divisible by K
- The Drunkard
- Infix to Postfix
- Efficiently sorting numbers in range from 0 to n^2 - 1
- Element with left side smaller and right side greater
- ADA Noise
- Two numbers with odd occurrences
- Sequence of Sequence
- Consecutive numbers for sum
- Element in a Series
- Modular multiplicative inverse
- Transitive closure of a Graph
- Array Subset of another array
- Karatsuba Algorithm
- Smallest Positive missing number
- Divisible by 5 or not-1
- Count the paths
- First negative integer in every window of size k
- Length of longest subarray
- Unique substrings
- Merge two binary Max heaps
- Sum of product of all pairs
- Game with String
- N-divisors
- Sort the pile of cards
- Four Elements
- Find the highest occurring digit in prime numbers in a range
- Paths to reach origin
- Maximum Sum LCM
- Subarray with 0 sum
- Faulty wiring and Bulbs
- Get Minimum Squares
- Regular polygon-1
- Rotate matrix elements clockwise
- Combine the strings
- Max Circular Subarray Sum
- Number starting with 1 in b-base
- Nth catalan number
- Subarray range with given sum
- Group Anagrams Together
- Number of divisors in a given range
- Find the closest prime number to a given number
- Sum equals to Sum
- Find Pair Given Difference
- Carry counter
- Count the elements
- Top k numbers in a stream
- Possible Pairs
- Second most repeated string in a sequence
- Equalize an array in minimum operations
- Reverse vowels in a given string
- Minimum value product
- Count all possible paths from top left to bottom right
- Minimum Deletions
- k modulus array element
- Shortest Common Supersequence
- Sort the given array after applying the given equation
- k sorted array
- Circular tour
- Assign Mice Holes
- Mr. Modulo and Arrays
- Greedy Fox
- Nth number made of prime digits
- Large number division
- Happiest Triplet
- Find pairs with given relation
- Mr Modulo and Pairs
- Painting the Fence
- Rearrange a string
- Minimum Number in a sorted rotated array
- Find distinct elements
- Largest Permutation
- Sum of length
- Sort by Absolute Difference
- Euler Totient Function
- Maximum occured integer
- Divisibility by 999
- Bird and maximum fruit gathering
- BBT counter
- Sub-Array sum divisible by K
- Corners of a Rectangle
- Number of Groups
- Ticket sellers
- Minimum Toogles to partition
- Primes sum
- Fibonacci Expression
- Swapping pairs make sum equal
- Number and the Digit Sum
- Money Division
- Toppers Of Class
- Decode It
- Sum of K Primes
- String Ignorance
- Count the number of ways to tile the floor of size n x m using 1 x m size tiles
- Break a number
- Minimum insertions to sort an array
- Minimum number of deletions and insertions.
- Minimum number of deletions to make a sorted sequence
- Minimum steps to delete a string
- Maximum product
- Minimum steps to minimize n as per given condition
- Minimum number of deletions.
- Jumping Caterpillars
- Closest Strings
- Replace a word
- Longest alternating subsequence
- Non-decreasing subsequence
- Ways to sum to N
- Number of substrings divisible by 8 but not by 3
- Bitonic Generator Sort
- Subset with sum divisible by m
- Count of strings that can be formed using a, b and c under given constraints
- Nth item through sum
- Number of subsequences in a string divisible by n
- Shortest Uncommon Subsequence
- Size of array after repeated deletion of LIS
- Broken blocks
- Sum of Divisors in an array
- Find length of longest subsequence
- Count binary strings
- Ways to write n as sum
- Find all distinct subset (or subsequence) sums
- Longest subsequence-1
- Sum of average of all subsets
- Maximum sum Problem
- Number of permutation with K inversions
- String comparison
- Minimum indexed character
- Maximum Sub-String after at most K changes
- Find number of times a string occurs as a subsequence
- Minimum Cost To Make Two Strings Identical
- Printing Maximum Sum Increasing Subsequence
- Longest Geometric Progression
- Find minimum adjustment cost of an array
- Consecutive Array Elements
- High-effort vs. Low-effort
- Longest Repeating Subsequence
- Stickler Thief
- Bell Numbers
- Maximum weight transformation of a given string
- Compute sum of digits in all numbers from 1 to n
- Total number of non-decreasing numbers with n digits
- Remaining String
- Minimum Swaps for Bracket Balancing
- Longest Zig-Zag Sub Sequence
- Primitive Typing
- k-th smallest number using digits of a given number
- Maximum Product Cutting
- Power Set
- Lucky Numbers
- Even and odd elements at even and odd positions
- Find the most frequent digit
- Compute nCr % p
- Find smallest values of x and y such that ax – by = 0
- Maximum Integer Value
- Geek and its Colored Strings
- Palindromic Primes
- Compute (a*b)%c
- Find Last Digit Of a^b for Large Numbers
- Maximum number of zeroes
- Merging two unsorted arrays in sorted order
- Transform the array
- Winter is Coming
- Find maximum number
- N’th Smart Number
- Even Fibonacci Numbers Sum
- N’th Pentagonal Number
- Prime factors of LCM of array elements
- Smallest number by rearranging digits of a given number
- Power Of 2 and Subsequences
- Pell Number
- Second Binary Digit
- Sum of Lengths of Non-Overlapping SubArrays
- Equalize the Towers
- Maximum sum of subarray less than or equal to x
- Maximum possible sum
- Convert to Strictly increasing array
- Roll the characters of a String
- Emirp numbers
- Primorial of a number
- Mersenne Prime
- Generate all palindromic numbers less than n
- Kth LSB
- Chocolate Station
- Compatible friends
- Common Subsequence
- K-Ary Tree
- Adding Array Elements
- Right angled triangles
- Boundary Elements of Matrix
- Maximum sum difference
- Query and Array
- Count the triplets
- Sub-arrays with equal number of occurences
- Maximum size of consecutives
- Star elements
- Min Manipulations to make Strings Anagram
- Three consecutive duplicates
- Completing tasks
- Chicks in a Zoo
- Smallest number in one swap
- Sort the way !
- Base Equivalence
- First K Digits
- Special Numbers
- Carol Numbers
- Sum of two large numbers
- Largest number in one swap
- Flipping bits No and Binary Format in Reverse Order
- Check if a Integer is power of 8 or not
- Required Rooms
- Find the minimum time
- Balancing Pan
- Geek and its Game of Coins
- Largest Proper fraction
- Print the pattern
- Quick Exponents
- Maximize XOR
- Psuedobinary Numbers
- Maximum Height Tree
- Prime number of set bits
- Remove minimum number of elements
- Check if divisible by 10
- Make a string from another string
- Divisible by 7
- Maximum value of expression
- Reversing the equation
- Pairs with Positive Negative values
- Maximum prefix sum for a given range
- Array's Game
- Express N as sum of 4 prime numbers
- Count the pairs with maximum difference
- Minimum rotations to unlock a circular lock
- Convertible string
- Sequence Fun
- Numbers containing 1, 2 and 3
- Modified Numbers and Queries
- Mean of range in array
- Number of subarrays whose minimum and maximum are same
- Pairs with Difference less than K
- Find k-th missing element
- Ana and Sweets
- Woodall Number
- Incomplete Array
- Sum Indexes
- Count Primes In Range
- Mike and Chocolates
- Find unit digit in a Product
- Power of K in N! where K may be Non Prime
- GeeksforGeeks New System
- Equal Sums
- Set all the bits in given range of a number
- Cereals Box
- Count Pairs
- Beautiful Sequence
- Cluster all the 1 in a given string
- Find X
- Longest sub-sequence such that difference between adjacents is one
- Geek and his Array
- Geek and his Tricky Series
- Maximum number of characters between any two same character
- Cumulative frequency of count of each element in an unsorted array
- Winner of an election
- Close to Perfection
- Count of substrings containing K ones
- Minimum element whose N-th power is greater than product of an array
- Next Happy Number
- Summed Matrix
- Morning Assembly
- Find the smallest root
- Missing Intervals
- Fact Digit Sum
- Non-Repeating Element
- Last seen array element
- Count numbers which can be constructed using two numbers
- Find the maximum number of handshakes
- Nth character in Concatenated Decimal String
- Find if string is K-Palindrome or not
- Check if possible to move from given coordinate to desired coordinate
- Closing bracket index
- Number of pairs with maximum sum
- Longest common prefix
- Roof Top
- Chandler and Joey
- Pairs which are Divisible by 4
- Maximum AND Value
- Distributing Question Papers
- Interesting Series
- Gambling Stark
- Trisha's Number
- Split the Array
- Ritika's Money
- Count unset bits in a given Range
- Rearrange array such that even positioned are greater than odd
- Telephone Number or Involution Number
- Find winner of the Game of Nim
- Smallest subarray with all occurrences of a most frequent element
- Sum of all divisors from 1 to n
- Maximum distinct elements after removing K elements
- Maximum difference of zeros and ones in binary string
- Sexy Primes
- The Mighty Divisible Number
- Arya and The Great War
- N trailing zeroes in factorials
- Mystic Falls School
- Find out the Team
- Count numbers with unit digit K in given range
- Largest sum of digits in all Divisors
- Number of edges in a Planar Graph
- Smallest sub-array with all occurences of most frequent element
- The Palindrome Pattern
- Swap the closest and farthest digits
- Nearest multiple of 10
- Remove leading zeros from an IP address
- Add two numbers represented by two arrays
- Remainder of array multiplication
- Reorganize The Array
- A New Year Game
- Longest sub-string having frequency of each char less than integer k
- The invariable units digit
- Word with maximum frequency
- Form a number divisible by 3 using array digits
- Check if array contains contiguous integers with duplicates allowed
- Kronecker Product
- Rearrange an array such that arr[i] = i
- Even Decimal Binary String
- Cosmic Number
- Closest Triplet
- Balanced string
- Maximum height of the staircase
- C++ Alternate words in reverse order.
- Extra Perfect Numbers
- C++ Visible Numbers
- Rope Cutting
- Ease the Array
- Maximize permutations
- Villain Con
- Amicable Pair
- Pair the minimum
- Count ways to express N as the sum of 1,3 and 4
- Numbers with prime frequencies greater than or equal to k
- Cross the hurdles: The Game
- Counts Zeros Xor Pairs
- String Modification
- Easy string
- Damon Prime
- Count pairs Sum in matrices
- C++ Matrix Rotation by 180 degree
- Swap every two bits in bytes
- Convert a sentence into its equivalent mobile numeric keypad sequence
- Check if a number is divisible by 8
- XOR of two numbers after making length of their binary representations equal
- Hungry Pizza Lovers
- Arya's Long String
- Ishaan and Sticks
- Mysterious Series
- Akaash's Assignment
- Check if it is possible to convert one string into another with given constraints
- Find the closest pair from two arrays
- Common Divisor
- English Words
- Minimum Swaps required to group all 1’s together
- The Inverting Factor
- Summing the Sum
- Print all bitwise subsets of a number N
- Maximum sum of increasing order elements from n arrays
- The Non-repetitive String
- Longest substring with equal number of 0s and 1s
- Possible Timings
- Holi Balloons
- The Fastest Method
- Ishaan's Curiosity
- Charul and vessels
- LCS of '0' K Repeated String
- Print Bracket Number
- Maximum number of partitions that can be sorted individually to make sorted
- Anand's Maths question
- Check if it is possible to survive on Island
- The Bit Game
- Dr. Zora's Algorithm
- Surround the 1's
- The Buggy Robot
- Searching in an array where adjacent differ by at most k
- Cutting Binary String
- The Even Array
- Shoot, Reload, Repeat
- Altered Board Problem - Unclear statement
- Palindromic Series
- Print binomial expansion series
- The Light Problem
- The Modified String
- Days of Our Lives
- The Optimal Selection
- Check if any valid sequence is divisible by M
- Minimum changes to make all substrings distinct
- Akku and Binary Numbers
- Find n-th Fortunate Number
- Difficult Problems
- Ishaan's Birthday
- Help Ishaan
- Variation in Nim Game
- Sorting all array elements except one
- Candy Packets
- Smallest number with sum of digits as N and divisible by 10^N
- Maximum number of customers that can be satisfied with given quantity
- Nikit's Problem
- Reaching the heights
- Delete array elements which are smaller than next or become smaller
- Mansi and her series
- Divisor Product
- The Strange Assignment
- Withdrawing Money
- Lucky Ishaan
- The Wedding Date
- Smallest greater elements in whole array
- Eulerian Path in an Undirected Graph
- Minimal moves to form a string
- Connell Sequence
- Product of Prime Factors
- Ordered Prime Signature
- Ways to split string such that each partition starts with distinct letter
- Save Ironman
- Penalty Shooters
- Fitting The Array
- Archana and her tricky string
- Find The Sequence
- Are you "Perfect"
- K-th missing element
- XOR Cipher
- Print adjacency list
- Java Collections | Set 6 (Stack)
- C++ Exception Handling
- Reverse a linked list
- Occurence of an integer in a Linked List
- Delete N nodes after M nodes of a linked list
- Rotate a Linked List
- Pairwise swap elements of a linked list by swapping data
- Given a linked list of 0s, 1s and 2s, sort it.
- Add two numbers represented by linked lists
- Rearrange a linked list
- Add 1 to a number represented as linked list
- linked list of strings forms a palindrome
- Compare two linked lists
- Merge 2 sorted linked list in reverse order
- Linked List in Zig-Zag fashion
- Detect Loop in linked list
- Rearrange linked list in-place
- Remove duplicates from an unsorted linked list
- Sorted insert for circular linked list
- Split a Circular Linked List into two halves
- Reverse a Doubly Linked List
- Insertion Sort
- Merge Sort
- Quick Sort
- Right View of Binary Tree
- K distance from root
- Mirror Tree
- Two Mirror Trees
- Maximum Width of Tree
- Delete without head pointer
- Diameter of Binary Tree
- Check for Balanced Tree
- Heap Sort
- n'th node from end of linked list
- Left View of Binary Tree
- Delete Middle of Linked List
- Merge two sorted linked lists
- Sum Tree
- Decimal Equivalent of Binary Linked List
- Transform to Sum Tree
- Intersection of two sorted Linked lists
- Find Transition Point
- Queue using two Stacks
- Remove duplicate element from sorted Linked List
- Stack using two queues
- Level order traversal in spiral form
- Reverse Level Order Traversal
- DFS of Graph
- Boundary Traversal of binary tree
- Reverse alternate levels of a perfect binary tree
- Insert a node in a BST
- BFS of graph
- Lowest Common Ancestor in a Binary Tree
- Determine if Two Trees are Identical
- Root to leaf path sum
- Print all nodes that don’t have sibling
- Postorder traversal from given Inorder and Preorder traversals
- Absolute List Sorting
- Lowest Common Ancestor in a BST
- Implement two stacks in an array
- Operations on Binary Min Heap
- Max sum path in two arrays
- Run Length Encoding
- Largest subarray of 0's and 1's
- Level order traversal Line by Line
- Print BST elements in given range
- The Celebrity Problem
- Largest subarray with 0 sum
- Print a Binary Tree in Vertical Order - Code wrong
- Minimum Depth of a Binary Tree
- Remove duplicates in small prime array
- Odd even level difference
- Almost Prime Numbers
- Binary Tree to BST
- K-Palindrome
- Find nth element of spiral matrix
- Max sum in the configuration
- Get minimum element from stack
- Equilibrium index of an array
- Unique rows in boolean matrix
- Serialize and Deserialize a Binary Tree
- Remove every k'th node
- Leaf at same level
- Is Binary Tree Heap
- Subtraction in Linked List
- Match specific pattern
- Validate an IP Address
- Find Maximum value
- Multiply two linked lists
- Distinct occurrences
- C++ STL | Set 2 (pair)
- Sorted subsequence of size 3
- Sum of subset differences
- Josephus problem
- Java Collection | Set 1 (ArrayList) Part-2
- Java Collection | Set 2 (Set)
- You and your books
- Expression Tree
- Java Collection | Set 3 (HashMap) Part-2
- Points in Straight Line
- Maximum Difference
- Check if Linked List is Palindrome
- Max distance between same elements
- Print matrix in diagonal pattern
- Repetition of k length substring
- Find perimeter of shapes
- Generate Grey Code Sequences
- Check whether BST contains Dead End
- Delete a Node in Single Linked List
- Kth largest element in BST
- Find duplicates in an array
- Multiply two polynomials II
- Minimum four sum subsequence
- Count distinct elements in every window
- Check if two strings are k-anagrams or not
- Max Level Sum in Binary Tree
- Special Stack
- Root to leaf paths sum
- Three way partitioning
- Print Nodes having K leaves
- Sort a stack
- String Modification
- Longest consecutive sequence in Binary tree
- Print Common Nodes in BST
- Level order traversal
- Peak element
- Inorder Successor in BST
- Delete nodes greater than k
- Index Of an Extra Element
- Merge Sort for Linked List
- Sum of given range
- Convert Ternary Expression to Binary Tree
- Maximum Bipartite Matching
- Union of Two Linked Lists
- Intersection of Two Linked Lists
- Disjoint set (Union-Find)
- Insert in a Sorted List
- Split Singly Linked List Alternatingly
- Ancestors in Binary Tree
- Level of a Node in Binary Tree
- Sum of leaf nodes in BST
- Mountain Subarray Problem
- Root to Leaf Paths
- Maximum path sum
- Counting Sort
- Max and min element in Binary Tree
- Perfect Binary Tree
- XOR Linked List
- Counting elements in two arrays
- Sum of digits in factorial of a number
- Reverse a string using Stack
- Linked List that is Sorted Alternatingly
- XOR of a given range
- Full binary tree
- Modify Linked List-1
- Triplet with 0 sum in BST
- Symmetric Tree
- Construct Tree from Inorder & Preorder
- Construct BST from Postorder
- Merge Lists Alternatingly
- Range of Composite numbers
- Arrange Consonants and Vowels
- Huffman Decoding
- Huffman Decoding-1
- Vertical sum
- Next Right Node
- Count Pairs whose sum is equal to X
- Insert in Sorted way in a Sorted DLL
- Check if Tree is Isomorphic
- Depth of node
- pth common ancestor in BST
- Predecessor and Successor
- Leaves to DLL
- Maximum Node Level
- Children Sum Parent
- Diagonal Sum In Binary Tree
- Find length of Loop
- Deletion and Reverse in Linked List
- K-Nearest Neighbours
- Change of Key in BST
- Normal BST to Balanced BST
- Leaf under budget
- Linked List Matrix
- Reverse First K elements of Queue
- Remove Half Nodes
- Height of Spiral Tree
- Sum of Leaf Nodes
- Sum of Right Leaf Nodes
- Sum of Left Leaf Nodes
- Deletion in a Binary Tree
- Nodes at Odd Levels
- Closest Neighbor in BST
- Brothers From Different Roots
- Sum of the Longest Bloodline of a Tree
- Exchange the Leaf Nodes
- Kth Ancestor in a Tree
- Check if two Nodes are Cousins
- ZigZag Tree Traversal
- Sum of Leaf Nodes at Min Level
- C++ STL Priority Queue
- Tilt of Binary Tree
- Move all zeros to the front of the linked list
- Delete middle element of a stack
- Vertical Width of a Binary Tree
- Rotate doubly Linked List by P nodes
- C++ Multi-level inheritance
- Java Collections | Set 7 (LinkedList)
- C++ Function overloading
- C++ complex number addition (operator overloading)
- C++ Template
- Java Exception Handling

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Complement
- Sum Of Prime
- Number of Unique Paths
- Rank The Permutations
- Excel Sheet | Part - 1
- Maximum Sub Array
- Print Diagonally
- Wave Array
- Overlapping Intervals
- Equal Sum
- Next Permutation
- Longest Increasing Subsequence
- Arithmetic Progression
- Longest Common Subsequence
- Minimum number of jumps
- Count ways to reach the n’th stair
- Count ways to N'th Stair(Order does not matter)
- Egg Dropping Puzzle
- Count of n digit numbers whose sum of digits equals to given sum
- Edit Distance
- Magic Triplets
- nCr
- Maximum Rectangular Area in a Histogram
- Longest Span with same Sum in two Binary arrays
- Min Coin
- Consecutive 1's not allowed
- Next Smallest Palindrome
- Game of Chocolates
- Count of Subarrays
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- String formation from substring
- Count Numbers in Range
- Case-specific Sorting of Strings
- Rank of Matrix
- Sum of bit differences
- Maximize The Array
- Factorials of large numbers
- Minimum Platforms
- Number following a pattern
- Find Prime numbers in a range
- Number of paths in a matrix with k coins
- Possible words from Phone digits
- Jumping Numbers
- Longest Palindrome in a String
- Modular Exponentiation for large numbers
- Concatenation of Zig-Zag String in ‘n’ Rows
- Sum of Query I
- Relative Sorting
- Black and White
- Largest square formed in a matrix
- Row with max 1s
- Count Integral Points
- Sorting Elements of an Array by Frequency
- Design a tiny URL or URL shortener
- Nuts and Bolts Problem
- Rotate a 2D array without using extra space
- Special Keyboard
- Number of ways
- Dyck Path
- Minimum Cost of ropes
- Power of Largest Prime
- Sum of Query II
- Form a palindrome
- Preorder to Postorder
- Maximum length Bitonic Subarray
- Length of the longest substring
- Smallest number on left
- Longest consecutive subsequence
- Largest subsquare surrounded by ‘X’
- Maximum Sum Path in Two Arrays
- Convert an array to reduced form
- M-Coloring Problem
- Minimum steps to get desired array
- Subsequence matching
- Dimensions of Rectangle
- Handshakes
- Tic-Tac-Toe
- Number to words
- Palindromic Array
- Betting game
- Unique partitions
- Is Binary Number Multiple of 3
- Possible groups
- Distributing Balls
- Maximum Sum Subsequence of length k
- Preorder Traversal and BST
- Card Rotation
- Search Pattern
- Longest Arithmetic Progression
- Connecting Nodes
- Square Numbers
- Subsets with XOR value
- Jumbled Strings
- Palindromic Strings
- Max possible amount
- Cost of Sweets
- Bleak Numbers
- Super Primes
- Crazy Equations
- Divide and Subtract Game
- Product of Primes
- Coin Piles
- Satisfy the equation
- Total number of Equal Partition
- Maximum XOR subset
- Maximum Profit
- Minimum sum
- Circle of strings
- Nodes at even distance
- Build the smallest
- Queries on Strings
- Your Social Network
- Largest number in K swaps
- Special Matrix
- Minimize the heights
- Lots of Work
- Composite and Prime
- LCM Triplet
- nCr mod M | Part 2
- Taking 1 out of 3 consecutives
- Total Decoding Messages
- Unique BST's
- Distinct Transformations
- Subsets
- Interesting Queries
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Longest Prefix Suffix
- K’th smallest element
- Divisible by 8
- Divisibility
- Transform String
- Sum of Subarrays
- The Smurfs
- Count Divisors of Factorial
- Maximum calorie
- Prime Factors and their Powers
- Find the pattern
- 7 Segment Display
- Longest Common Substring
- Easy Query
- Count Number
- Count Palindrome Sub-Strings of a String
- Find patterns
- Largest Divisibility Test
- Check if a string is repetition of its substring of k-length
- Rotate and delete
- Negative weight cycle[test cases to be corrected]
- Sonam Bewafa asks questions
- Count the Number of Full Binary Trees
- Minimums in Array
- Mathematical manipulation
- Snake and Ladder Problem
- Brain Game
- Tricky Subset Problem
- Shortest Source to Destination Path
- Divisibility tree
- Number of Palindromic paths in a Matrix
- Trie | (Insert and Search)
- Replace O's with X's
- Partition a number into two divisible parts
- Knight Walk
- Find all four sum numbers
- Substring - Subsequence problem
- Count of AP Subsequences
- Word Boggle
- Form coils in a matrix
- Max absolute difference
- Print leaf nodes from preorder traversal of BST
- Reverse Delete Algorithm for Minimum Spanning Tree
- Distance of nearest cell having 1
- Is Sudoku Valid
- Find whether path exist
- Largest prime factor
- Check Mirror in N-ary tree
- Length of largest region of 1's
- Rearrange characters
- Express as sum of power of natural numbers
- First non-repeating character in a stream
- Magical Box
- Kth Smallest Factor
- Count subsequences of type a^i b^j c^k
- Stepping Numbers
- Find the largest number
- Convex Hull
- Matrix Exponentiation
- Count in array
- Techfest and the Queue
- Kth largest element in a stream
- Water Overflow
- Magnet Array Problem
- ThrowBall at Fair
- Smallest distinct window
- James Bond and Divisors
- Minimum number of steps to reach a given number.
- Floyd Warshall
- Huffman Encoding
- Nearly Sorted Algorithm
- Optimal binary search tree
- Smallest Absolute Difference
- Geek collects the balls
- Largest Sum Subarray of Size at least K
- Longest Bitonic subsequence
- Mobile numeric keypad
- Little Murph and knots
- Reverse Spiral Form of Matrix
- Pyramid form
- Maximum sum Rectangle
- Maximum Intervals Overlap
- Minimum Time
- Word Wrap
- Perfect Sum Problem
- Longest Path in a matrix
- Array Pair Sum Divisibility Problem
- Job Sequencing Problem
- Cows of FooLand
- Number of palindromic strings
- Factorial and numbers
- Page Faults in LRU
- Count possible ways to construct buildings
- Firing employees
- Min cut Square
- Image Multiplication
- N Digit numbers with digits in increasing order
- Rotten Oranges
- Mila and strings
- Prime factorization and geek number
- Modify array to maximize sum of adjacent differences
- Count ways to increase LCS length of two strings by one
- Sisters and coins
- Probability of Knight
- LCS of three strings
- Two water Jug problem
- Longest repeating and non-overlapping substring
- Count digit groupings of a number
- CamelCase Pattern Matching
- Minimum cost to fill given weight in a bag
- Count even length
- Steps by Knight
- Median In a Row-Wise sorted Matrix
- Smith Number
- Mail System Design
- Large Product-2
- Numbers with alternative 1's
- Smallest Non-Zero Number
- Count of sum of consecutives
- Longest common substring value of two numbers
- Subarray Inversions
- Coins and Game
- Brackets in Matrix Chain Multiplication
- Matrix Chain Multiplication
- Sum-string
- Pairs of Non Coinciding Points
- Nine Divisors
- A Game of LCM
- Carmichael Numbers
- Maximum bitonic subarray sum
- Maximum Tip Calculator
- Maximum GCD Pair
- Alternate Vowel and Consonant String
- Find the element at given index
- Next higher number in one swap
- Previous number in one swap
- Recurrence Matrix
- Money Distributions
- Count divisors of product of array elements
- Print N-bit binary numbers having more 1’s than 0’s
- Queries for counts of multiples in an array
- Next higher palindromic number using the same set of digits
- Series with largest GCD and sum equals to N
- Find the last digit when factorial of A divides factorial of B
- Biconnected Graph
- Find the Maximum sum
- Save Your Life
- Last two digits of Fibonacci
- Leftmost Divisor
- The Infinite String
- Even Distanced Tree Vertices[Duplicate]
- Pizza Mania
- Killing Spree
- Yes XOR No
- Number of subarrays with maximum values in given range
- Count of Palindromic substrings in an Index range
- Mike and Photographic Memory
- Fill the Tank
- Party in Town
- Lazy Pasha
- Longest subarray with sum divisible by K
- Count subarrays with equal number of 1’s and 0’s
- Make Matrix Beautiful
- Longest Sub-Array with Sum K
- Pasha and Primes
- Sick Pasha
- Beautiful SubSequence
- The Fibonacci-prime number
- The Tiny Miny
- Check if strings are rotations of each other or not
- Letters Collection
- Big Numbers Series
- Sum of XOR of all pairs
- Save Winterfell
- Marks of PCM
- Pass the semester
- String Conversion
- Grouping Of Numbers
- Geek and Strings
- Print Binary Tree levels in sorted order
- Save Gotham!
- Buying Vegetables
- Shreyansh and his bits
- Minimum swaps and K together
- Maximize the sum of selected numbers from an array to make it empty
- Find the N-th character
- Large Factorials
- Lucky alive person in a circle
- Rat Maze With Multiple Jumps
- Given a linked list, reverse alternate nodes and append at the end
- Reverse a Linked List in groups of given size.
- Delete nodes having greater value on right
- Quick Sort on Linked List
- Count BST nodes that lie in a given range
- Check for BST
- Bottom View of Binary Tree
- Intersection Point in Y Shapped Linked Lists
- Add all greater values to every node in a BST
- Construct Binary Tree from Parent Array
- Connect Nodes at Same Level
- Clone a linked list with next and random pointer
- Flattening a Linked List
- Diagonal Traversal of Binary Tree
- Delete a node from BST
- Detect cycle in a directed graph
- Detect cycle in an undirected graph
- Min distance between two given nodes of a Binary Tree
- Maximum difference between node and its ancestor
- Range Minimum Query
- Topological sort
- Merge K sorted linked lists
- Find the number of islands
- Circular tour
- Wildcard Pattern Matching
- Max rectangle
- Make Binary Tree
- Generate IP Addresses
- Check if subtree
- Extreme nodes in alternate order
- Kth element in Matrix
- Clone a Binary Tree
- Remove loop in Linked List
- Implementing Dijkstra | Set 1 (Adjacency Matrix)
- Max length chain
- Minimum Spanning Tree
- Additive sequence
- Largest BST
- Interleaved Strings
- Sum of permutations
- Box Stacking
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Strongly Connected Components (Kosaraju's Algo)
- Longest Consecutive Subsequence
- Rat in a Maze Problem
- Bipartite Graph
- Max sum subarray by removing at most one element
- Maximum subset XOR
- Number of root to leaf paths
- Find the Closest Element in BST
- Pots of Gold Game
- Delete keys in a Linked list
- Merge two BST 's
- Trie | (Delete)
- Merge k Sorted Arrays
- Length of longest palindrome in linked list
- Bridge Edge in Graph
- Duplicate subtree in Binary Tree
- Find the missing no in string
- Top View of Binary Tree
- Smallest range in K lists
- k-th smallest element in BST
- Polynomial Addition
- Euler Circuit in a Directed Graph
- Euler circuit and Path
- Merge Sort on Doubly Linked List
- Binary Tree to CDLL
- Find a pair with given target in BST
- Count Element Occurences
- Occurences of 2 as a digit
- Complete Binary Tree
- Populate Inorder Successor for all nodes
- Range LCM Queries
- Construct expression tree
- K-Sum Paths
- Foldable Binary Tree
- Leftmost and rightmost nodes of binary tree
- Construct tree from Inorder and LevelOrder
- Node at distance
- Mirror of a given node
- Pairs violating BST property
- Maximum path sum from any node
- Largest Independent Set Problem
- Median of BST
- Number of Turns in Binary Tree
- Right Sibling in Binary Tree
- Duplicate Subtrees
- Construct Tree from Preorder Traversal
- Construct a Full Binary Tree
- Convert Level Order Traversal to BST
- Count Number of SubTrees having given Sum
- C++ Friend function
- C++ Generic sort

- Minimum Points To Reach Destination
- Maximum Index
- Minimum sum partition
- Maximum of minimum for every window size
- Head to Tail ordering
- Largest Number formed from an Array
- Find sum of different corresponding bits for all pairs
- Rearrange an array with O(1) extra space
- Return two prime numbers
- Allocate minimum number of pages
- A Simple Fraction
- Ugly Numbers
- Largest rectangle of 1’s with swapping of columns allowed
- Path of greater than equal to k length
- Rohan's Love for Matrix
- Create your own Calculator
- nCr mod M | Part 1
- Number Formation
- X Total Shapes
- Boolean Parenthesization
- Longest valid Parentheses
- Word Break - Part 2
- Print all LCS sequences
- Minimum Cost Path
- N-Queen Problem
- Solve the Sudoku
- Strongly connected component (Tarjans's Algo)
- Generalised Fibonacci numbers
- Find median in a stream
- Travelling Salesman Problem
- Find the Maximum Flow
- Minimum number of elements
- Very Tough Problem
- Distinct palindromic substrings
- Next Optimal Move in Tic Tac Toe
- Phone directory
- Numbers with one absolute difference
- Count the subarrays having product less than k
- Lets play a Game
- Bike Racing
- Adventure in a Maze
- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Tree from Postorder and Inorder
- LRU Cache
- AVL Tree Insertion
- Partition array to K subsets
- Longest Palindromic Substring in Linear Time
- Alien Dictionary
- AVL Tree Deletion
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST