- Immediate Smaller Element
- Second Largest
- Reverse digit
- Binary representation
- Student record
- Check if a number is power of another number
- Palindrome
- Equal to product
- Maximum money
- Segregate 0s and 1s
- Overlapping rectangles
- Inverted triangle of stars
- Check if given four points form a square
- Reversal Algorithm
- Compare two Large Numbers
- Find duplicates under given constraints
- Check if string is rotated by two places
- Maximum sum of hour glass
- Compete the skills
- Tidy Number
- Distance between 2 points
- Sum of elements in a matrix
- Reversing the vowels
- Sum Palindrome
- Fighting the darkness
- Change the string
- Row with minimum number of 1's
- Bubble Sort
- Selection Sort
- Binary Search
- Print all possible strings
- Replace all ‘0’ with ‘5’ in an input Integer
- Middle Pattern
- Palindromic Array
- Maximum in Struct Array

Name

Institution

Coding Score

3368

Problems Solved

1478

Overall Rank: 2

Monthly Rank: 3814

Weekly Rank: 223612

- Reverse an Array
- Frequency of Array Elements
- Maximum and Minimum Of Array Elements
- Sum Of Digits
- Maximum Occuring Character
- Factorial
- Sum of Array
- Number of factors
- Leap Year
- Palindrome String
- Armstrong Numbers
- Prime Number
- LCM And GCD
- Multiply 2 matrices
- Sum of Series
- Searching a number
- Power of 2
- Series AP
- Series GP
- Sort The Array
- Binary number to decimal number
- Nth Fibonacci Number
- Sort a String
- Print the Kth Digit
- Sieve of Eratosthenes
- Shortest path from 1 to n
- Count possible triangles
- Dice throw
- Rotate Array by n elements
- Fascinating Number
- Permutations of a given string
- Count increasing Subarrays
- Rearrange Array Alternately
- 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
- Remove Spaces
- Value equal to index value
- Number of paths
- Boolean Matrix Problem
- Count total set bits
- Number is sparse or not
- Bit Difference
- Reverse sub array
- Count zero
- Sum of distinct elements
- Max Sum without Adjacents
- Swap kth elements
- Intersection of two arrays
- Union of two arrays
- Remove character
- Number of occurrence
- k largest elements
- Pairs of prime number
- Minimum difference pair
- Remove recurring digits
- Leaders in an array
- Find position of set bit
- Jumping Geek
- Sum of Digits Divisibility
- Possible groups
- Palindromic Subsequences
- Ways To Tile A Floor
- Absolute distinct count
- Generate Binary Numbers
- Shortest direction
- Smallest number
- Count the numbers
- Find the Odd Occurence
- Angle between hour and minute hand
- Keypad typing
- Generate binary string
- Total distance travelled in an array
- Sum of Products
- Extraction of secret message
- Minimum sum
- Even occurring elements
- Missing ranges of numbers
- Help the Old Man!!!
- Punish the Students
- Who Will Win?
- Total count
- Surpasser Count
- Product of Complex Numbers
- How many pizzas ?
- Sum of primes
- Minimize string value
- Rotate by 90 degree
- Rearranging array
- The AND Gate
- The OR Gate
- Missing number in matrix
- Good String
- Mega Sale
- Set Bits
- Prime Factors
- Subset Sums
- Longest Consecutive 1's
- Maximize sum after K negations
- Different ways to Spell a Number
- Count Sorted Rows
- Pairs with given XOR
- Padovan Sequence
- No of Carry Operations
- Distance and Displacement
- Equal Point in Sorted Array
- Elements before which no element is bigger
- Sum of elements between k1'th and k2'th smallest elements
- Minimize the sum of product
- Make a Distinct Digit Array
- Coverage of all Zeros in a Binary Matrix
- Chocolate Distribution Problem
- Demonitisation
- Check if a number can be expressed as x^y
- Permutations in array
- String with numbers at its end
- Interesting Patterns
- Help a Thief!!!
- At least two greater elements
- Encrypt the string - 1
- Replace the Bit
- Form a Triangle
- Drive the car
- Largest subarray with GCD one
- Squares in a Matrix
- 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
- Trace Path
- Unique Numbers
- XOR of all elements
- Check if divisible by 4
- 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
- Check if divisible by 36
- Find first set bit
- Minimize sum of alternate product
- Check for subsequence
- Check if the door is open or closed
- Find first repeated character
- Find difference between sum of diagonals
- 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
- 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
- Largest Fibonacci Subsequence
- Another Matrix Game
- Last index of One
- Arranging the array
- Common elements
- Tracks
- First element to occur k times
- Fill array with 1's
- Length of Last word
- Remove Duplicates from unsorted array
- Uncommon characters
- Minimum sum of two elements from two arrays
- Count of smaller elements
- Four Elements
- URLify a given string
- Multiple of X closest to N
- Reverse a string with spaces intact
- Faulty wiring and Bulbs
- Split Strings
- Find Smallest Missing in Sorted
- Count the elements
- Minimum move to front operations
- Even Odd Sum
- 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
- Count pair sum
- First Come First Serve
- K-th distinct element
- Friendly Array
- Max Odd Sum
- Largest Permutation
- 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]
- Toppers Of Class
- Pairs with odd XOR [ Duplicate ]
- Make a Palindrome
- Quick Left Rotation
- Bitonic Generator Sort
- Difficulty of sentence
- Toggle bits given range
- Stable Sort and Position
- Twice counter
- Longest Common Prefix in an Array
- Elements in the Range
- Remaining String
- In First But Second
- Primitive Typing
- Distinct Adjacent Element
- Adam Number
- Min value of x
- First K natural numbers
- Sum of distinct elements for a limited range
- Count triplets with sum smaller than X
- Maximum number of zeroes
- Odd to Even
- Minimum number of flipped bits
- Total number of Strings
- Minimum Distinct Ids
- Pell Number
- Find the Highest number
- Minimum sum of factors
- Twisted Prime Number
- Anagram Palindrome
- Closest Number
- Transform to prime
- First and last occurrences of X
- Positive and negative elements
- Boolean String Value
- Equalization of an array
- Just One Mismatch
- Finger Game
- Smallest number repeating K times
- Find the position of M-th item
- String Subsequence Game
- Sum of diagonals
- Rearrange the array
- Extract the integers
- Part Sort
- Ceil The Floor
- Sort first half in ascending and second half in descending
- Anshuman's Favourite Number
- Number of unique rectangles
- The Counting Game !!
- Sum of two large numbers
- Repated Sum and then Multiply
- Absolute Difference of 1
- Maximum number of unique prime factors
- Remove common characters and concatenate
- Numbers having two adjacent set bits
- Shortest un-ordered subarray
- Front-Back Transformation
- Swapping Triangles
- XOR Game
- Longest increasing subarray
- Sums of i-th row and i-th column
- Repeated I.Ds
- Binary representation of previous number
- Print the pattern
- Left Rotate Matrix K times
- Count number of digits after decimal
- Rectangle Number
- Sum of Digit Modified
- Count the characters
- Binary representation of next number
- Find k-th character in string
- Good or Bad string
- Repeated Character
- Numbers having alternate bits
- Red OR Green
- Sort String
- Difference between highest and lowest occurrence
- Find unique element
- Make a string from another string
- 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
- Minimum rotations to unlock a circular lock
- 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
- Set all the bits in given range of a number
- Print Linked List elements
- Count nodes of linked list
- Node at a given index in linked list
- Delete node in Doubly Linked List
- Size of Binary Tree
- Inorder Traversal
- Count Leaves in Binary Tree
- Merge Sort
- Quick Sort
- Mirror Tree
- Two Mirror Trees
- Height of Binary Tree
- Heap Sort
- Finding middle element in a linked list
- Circular Linked List
- Sum Tree
- Postorder Traversal
- Implement Stack using Linked List
- Implement stack using array
- Implement Queue using Linked List
- Implement Queue using array
- Square root
- Print all nodes that don’t have sibling
- Insert a node in Doubly linked list
- Run Length Encoding
- Remove duplicate elements from sorted Array
- Replace all 0's with 5
- Count zeros in a sorted matrix
- Equilibrium index of an array
- 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)
- 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)
- Remainder with 7
- Implement Atoi
- Repetition of k length substring
- Find Number of Numbers
- Minimum distance between two numbers
- Multiply Matrices
- Count distinct elements in every window
- Find triplets with zero sum
- Level order traversal
- Operating an array
- Linked List Insertion
- Operating a sorted array
- Insert in a Sorted List
- Play with an array
- Ancestors in Binary Tree
- Root to Leaf Paths
- Anagram of String
- Circular Linked List Traversal
- Linked List Length Even or Odd?
- Delete Alternate Nodes
- Identical Linked Lists
- Merge Lists Alternatingly
- Find the Sum of Last N nodes of the Linked List
- Modular Node
- Find n/k th node in Linked list
- Queue Reversal
- Triplet Family
- Sum of Binary Tree
- Sum of Leaf Nodes
- Insert in Middle of Linked List
- Pairwise Consecutive Elements

- Anagram
- Adding One
- Pascal Triangle
- 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
- Consecutive elements
- Trailing zeroes in factorial
- Maximize Number of 1's
- Non Repeating Character
- a^b(Set 2)
- Minimum number of Coins
- GCD of Array
- Repetitive Addition Of Digits
- Distinct Substrings
- Sum of Middle Elements of two sorted arrays
- 2's Complement
- Good Pairs
- First Repeating Element
- Count Occurences of Anagrams
- Reverse words in a given string
- Pythagorean Triplet
- 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
- Sum of Digit is Pallindrome or not
- Activity Selection
- Remove “b” and “ac” from a given string
- Strong Number
- Doubling the value
- Majority Element
- Equal Sum and Product
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Pairs with difference k
- Amend The Sentence
- Subset Sum Problem
- Two numbers with sum closest to zero
- Finding Number
- Stock buy and sell
- Maximum value in a bitonic array
- Number of paths in a matrix with k coins
- Next greater number set digits
- Possible words from Phone digits
- Finding Position
- Jumping Numbers
- Next sparse binary number
- Amount of Water
- Single Number
- Segregate even and odd nodes in a Linked List
- Does robot moves circular
- 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
- Maximum of all subarrays of size k
- Remove Duplicates
- Row with max 1s
- Kth distance
- Addition of submatrix
- Segregate Even and Odd numbers
- Maximum sum increasing subsequence
- Array to BST
- Sum of two numbers represented as arrays
- Facing the sun
- Triangular Number
- Greater on right side
- Common elements in three arrays(error)
- Convert array into Zig-Zag fashion
- 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
- Stock span problem
- 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
- Number of Days
- Where Am I ?
- Mapped String
- AND operation
- Filling Bucket
- Minimum Value Assigned
- Copy Set Bits in Range
- Comment Removal
- Two Repeated Elements
- Three Great Candidates
- K closest elements
- Count Multiples of Five
- Reach a given score
- Next in Series
- 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
- Day of the week
- Largest power of prime
- Number of 1's in smallest repunits
- Chinky and diamonds
- Shop in Candy Store
- K-Pangrams
- Largest number possible
- Sub-Array Pairs
- Pick values
- Missing element of AP
- Count the Zeros
- Distinct absolute array elements
- 0 - 1 Knapsack Problem
- Longest Common Increasing Subsequence
- Maximum Number of 1s
- Pangram Checking
- Maximum XOR subset
- Pangram Strings
- 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
- Last Match
- Special array reversal
- Next Prime Palindrome
- Maximum value K
- Extract the Number from the String
- Digit multiplier
- Number of ways to find two numbers
- Cutted Segments
- Smallest number subset
- Number of Heads
- Minimum number of swaps needed
- Number of distinct subsequences
- Maximum average subarray
- Game of Death in a circle
- Help Mommy out
- Power of Numbers
- Examination Papers
- Next larger element
- Class Average
- Gifts! Gifts! Gifts!
- Final Destination
- Arithmetic Number
- Left out candies
- Subtraction and two numbers
- Recursively find sum of digits
- Ordering of strings
- Sachin's love for runs
- Change Bits
- Count number of substrings
- Raju and coins
- Largest number with given sum
- Number of matches
- Non Fibonacci Number
- Nth digit in sequence
- Collection of pens
- 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
- Faulty Keyboard
- Finding the numbers
- Sort by Set Bit Count
- Optimal walk
- Minimum Energy
- Count Increasing Subsequences
- Least Prime Factor
- Left or Right Positioned Array
- Collecting Trees
- Happy Number
- Max and Min Products
- LCS with permutations
- Time Difference
- Modified Fibonacci
- Choose and Swap
- 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
- Dr. Strange's powers
- Mr. Binary
- Find Maximum Sum Strictly Increasing Subarray
- Largest Even Number
- Count Pairs in an Array
- Find (a^b)%m
- Sphenic 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
- Binary Tree K level sum
- String Reversal(Unpublished for now)
- Recursively remove all adjacent duplicates
- Exit Point in a Matrix
- Reverse each word in a given string
- Maximum Sum Bitonic Subsequence
- 1[0]1 Pattern Count
- Knapsack with Duplicate Items
- Make Zeroes
- Let's Play!!!
- Sum of k smallest elements in BST
- Make it Colorful
- 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
- Maximum no of 1's row
- 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
- Rahul a Geek
- Game of XOR
- Find Nth root of M
- Find largest word in dictionary
- Love For The Twins
- Find the nth number in the sequence
- 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
- Check if palindromic ignoring spaces
- 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
- 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
- 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
- Recursive sequence
- Rod Cutting
- Decreasing Sequence
- The Drunkard
- Infix to Postfix
- Check whether K-th bit is set or not
- Element with left side smaller and right side greater
- ADA Noise
- Two numbers with odd occurrences
- Element in a Series
- Modular multiplicative inverse
- Transitive closure of a Graph
- Array Subset of another array
- Smallest Positive missing number
- Longest Bitonic subsequence
- Count the paths
- First negative integer in every window of size k
- Length of longest subarray
- Unique substrings
- Mobile numeric keypad
- Merge two binary Max heaps
- Extract Maximum
- Sum of product of all pairs
- Game with String
- Sort the pile of cards
- Sum of numbers in string
- Find the highest occurring digit in prime numbers in a range
- Paths to reach origin
- Print first letter of every word in the string
- Subarray with 0 sum
- 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
- Count number of words
- Group Anagrams Together
- Number of divisors in a given range
- Find the closest prime number to a given number
- Sum equals to Sum
- Wildcard string matching
- Find Pair Given Difference
- Sorted matrix
- Carry counter
- Determinant of a Matrix
- 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
- Count all possible paths from top left to bottom right
- Minimum Deletions
- Shortest Common Supersequence
- k sorted array
- Circular tour
- Firing employees
- Greedy Fox
- Large number division
- Happiest Triplet
- Find pairs with given relation
- Painting the Fence
- Rearrange a string
- Minimum Number in a sorted rotated array
- Find distinct elements
- Sum of length
- Sort by Absolute Difference
- Euler Totient Function
- Maximum occured integer
- Bird and maximum fruit gathering
- BBT counter
- Sub-Array sum divisible by K
- Rotten Oranges
- Number of Groups
- Ticket sellers
- Minimum Toogles to partition
- Fibonacci Expression
- Swapping pairs make sum equal
- Money Division
- Decode It
- 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 minimize n as per given condition
- Minimum number of deletions.
- Closest Strings
- Replace a word
- Longest alternating subsequence
- Ways to sum to N
- 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
- Find length of longest subsequence
- Ways to write n as sum
- LCS of three strings
- Find all distinct subset (or subsequence) sums
- Longest subsequence-1
- Maximum sum Problem
- Longest repeating and non-overlapping substring
- Count digit groupings of a number
- 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
- Consecutive Array Elements
- High-effort vs. Low-effort
- Minimum cost to fill given weight in a bag
- Longest Repeating Subsequence
- Stickler Thief
- 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
- Minimum Swaps for Bracket Balancing
- Longest Zig-Zag Sub Sequence
- Even and odd elements at even and odd positions
- Print first n Fibonacci Numbers
- Maximum Integer Value
- Geek and its Colored Strings
- Palindromic Primes
- Compute (a*b)%c
- Check perfect square
- Find Last Digit Of a^b for Large Numbers
- Merging two unsorted arrays in sorted order
- Transform the array
- Winter is Coming
- Find maximum number
- GCD, LCM and Distributive Property
- N’th Smart Number
- Smallest number by rearranging digits of a given number
- Power Of 2 and Subsequences
- Second Binary Digit
- Product Sum
- Sum of Lengths of Non-Overlapping SubArrays
- Equalize the Towers
- Print Matrix in snake Pattern
- Maximum sum of subarray less than or equal to x
- Maximum possible sum
- Check a Integer is power of 3 or not
- Change all even bits in a number to 0
- Convert to Strictly increasing array
- Roll the characters of a String
- Emirp numbers
- Carol Number
- Mersenne Prime
- Generate all palindromic numbers less than n
- Kth LSB
- Chocolate Station
- Compatible friends
- Common Subsequence
- K-Ary Tree
- Adding Array Elements
- 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
- Maximum weight difference
- Three consecutive duplicates
- Chicks in a Zoo
- Smallest number in one swap
- Sort the way !
- Base Equivalence
- First K Digits
- Carol Numbers
- XOR Count Zero and One
- Largest number in one swap
- Flipping bits No and Binary Format in Reverse Order
- Powers game
- Check if a Integer is power of 8 or not
- Required Rooms
- Find the minimum time
- Make the hit in power game !
- Prime Palindrome Sum
- Geek and its Game of Coins
- Largest Proper fraction
- Quick Exponents
- Maximize XOR
- Finding Dory
- Maximum Height Tree
- Find the position
- Prime number of set bits
- Remove minimum number of elements
- First and last Bit
- Minimum product pair
- Product of factors of number
- Check if divisible by 10
- 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
- Convertible string
- Smallest K digit number divisible by X
- 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
- One's Complement
- Woodall Number
- Akash and Friend
- Incomplete Array
- Sum Indexes
- Count Primes In Range
- Find unit digit in a Product
- Power of K in N! where K may be Non Prime
- Three Number Even Sum
- Cereals Box
- Count Pairs
- Find X
- 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
- Right View of Binary Tree
- K distance from root
- Maximum Width of Tree
- Delete without head pointer
- Diameter of Binary Tree
- Check for Balanced Tree
- n'th node from end of linked list
- Left View of Binary Tree
- Delete Middle of Linked List
- Merge two sorted linked lists
- 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
- Depth First Traversal for a Graph
- Boundary Traversal of binary tree
- Reverse alternate levels of a perfect binary tree
- Insert a node in a BST
- BFS traversal of graph
- Lowest Common Ancestor in a Binary Tree
- Determine if Two Trees are Identical
- Root to leaf path sum
- Postorder traversal from given Inorder and Preorder traversals
- Absolute List Sorting
- Lowest Common Ancestor in a BST
- Implement two stacks in an array
- Max sum path in two arrays
- 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
- Minimum Depth of a Binary Tree
- Remove duplicates in small prime array
- Odd even level difference
- Binary Tree to BST
- K-Palindrome
- Find nth element of spiral matrix
- Max sum in the configuration
- Get minimum element from stack
- 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
- You and your books
- Expression Tree
- Maximum Difference
- Check if Linked List is Palindrome
- Max distance between same elements
- Print matrix in diagonal pattern
- 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
- Minimum four sum subsequence
- 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
- Peak element
- 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
- Union of Two Linked Lists
- Intersection of Two Linked Lists
- Split Singly Linked List Alternatingly
- Level of a Node in Binary Tree
- Sum of leaf nodes in BST
- Maximum path sum
- Max and min element in Binary Tree
- Perfect Binary Tree
- XOR Linked List
- Counting elements in two arrays
- 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
- 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
- Linked List Matrix
- Reverse First K elements of Queue
- Remove Half Nodes
- Height of Spiral Tree
- 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

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Complement
- Number of Unique Paths
- Rank The Permutations
- Excel Sheet | Part - 1
- Maximum Sub Array
- Print Diagonally
- Wave Array
- Overlapping Intervals
- Equal Sum
- Binary String
- Next Permutation
- Longest Increasing Subsequence
- 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)
- 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
- Count of Subarrays
- Longest Even Length Substring
- Path in Matrix
- Trapping Rain Water
- String formation from substring
- 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
- Longest Palindrome in a String
- Modular Exponentiation for large numbers
- Concatenation of Zig-Zag String in ‘n’ Rows
- Sum of Query I
- Relative Sorting
- Remove minimum elements
- Largest square formed in a matrix
- Count Integral Points
- 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
- 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
- Handshakes
- Tic-Tac-Toe
- Number to words
- Palindromic Array
- Betting game
- Unique partitions
- Is Binary Number Multiple of 3
- Distributing Balls
- Preorder Traversal and BST
- Search Pattern
- Longest Arithmetic Progression
- Triplet Sum in Array
- Connecting Nodes
- Jumbled Strings
- Palindromic Strings
- Max possible amount
- Bleak Numbers
- Smallest Sub-Array
- Coin Piles
- Satisfy the equation
- Maximum Profit
- 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
- Rubik's Cube
- Taking 1 out of 3 consecutives
- Total Decoding Messages
- Unique BST's
- Subsets
- Interesting Queries
- Combination Sum
- Combination Sum - Part 2
- Word Break
- Longest Prefix Suffix
- K’th smallest element
- Divisible by 8
- Transform String
- Sum of Subarrays
- The Smurfs
- Maximum calorie
- Prime Factors and their Powers
- Find the pattern
- 7 Segment Display
- Longest Common Substring
- Count Palindrome Sub-Strings of a String
- Find patterns
- Check if a string is repetition of its substring of k-length
- Rotate and delete
- Negative weight cycle[test cases to be corrected]
- Hamiltonian Path
- Sonam Bewafa asks questions
- Count the Number of Full Binary Trees
- Minimums in Array
- Snake and Ladder Problem
- 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
- 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
- First non-repeating character in a stream
- Kth Smallest Factor
- Count subsequences of type a^i b^j c^k
- Stepping Numbers
- Find the largest number
- Convex Hull
- Matrix Exponentiation
- Kth largest element in a stream
- Water Overflow
- Smallest distinct window
- Minimum number of steps to reach a given number.
- Floyd Warshall
- Huffman Encoding
- Nearly Sorted Algorithm
- Smallest Absolute Difference
- Geek collects the balls
- Largest Sum Subarray of Size at least K
- 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
- Page Faults in LRU
- Count possible ways to construct buildings
- Min cut Square
- Image Multiplication
- N Digit numbers with digits in increasing order
- Mila and strings
- Prime factorization and geek number
- Sisters and coins
- Two water Jug problem
- CamelCase Pattern Matching
- Count even length
- Steps by Knight
- Median In a Row-Wise sorted Matrix
- Smith Number
- Mail System Design
- 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
- Pairs of Non Coinciding Points
- Special Numbers
- Carmichael Numbers
- Valid expression
- Maximum bitonic subarray sum
- Maximum Tip Calculator
- Alternate Vowel and Consonant String
- 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
- Find the last digit when factorial of A divides factorial of B
- Biconnected Graph
- Find the Maximum sum
- Save Your Life
- Reverse a Linked List in groups of given size.
- Delete nodes having greater value on right
- 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
- Operations on Binary Min Heap
- 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
- Largest BST
- Interleaved Strings
- Multiply two strings
- Minimum Swaps
- 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
- 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
- Inorder Successor in BST
- 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
- Number of Turns in Binary Tree
- Duplicate Subtrees
- Construct Tree from Preorder Traversal
- Construct a Full Binary Tree

- Minimum Points To Reach Destination
- Maximum Index
- Minimum sum partition
- Maximum of minimum for every window size
- Head to Tail ordering
- Find Prime numbers in a range
- 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
- Sorting Elements of an Array by Frequency
- A Simple Fraction
- 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
- X Total Shapes
- Boolean Parenthesization
- Longest valid Parentheses
- Word Break - Part 2
- Minimum Cost Path
- N-Queen Problem
- Solve the Sudoku
- Generalised Fibonacci numbers
- Find median in a stream
- Travelling Salesman Problem
- Minimum number of elements
- Very Tough Problem
- Distinct palindromic substrings
- Similar expressions
- Phone directory
- Hexadecimal to decimal counter
- Numbers with one absolute difference
- Count the subarrays having product less than k
- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Tree from Postorder and Inorder
- LRU Cache
- AVL Tree Insertion
- Alien Dictionary
- AVL Tree Deletion
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST