- Binary String
- Power of 2
- Sieve of Eratosthenes
- Rotate Array
- Missing number in array
- Maximum product of two numbers
- Number of paths
- Bit Difference
- Greater on right side
- Convert array into Zig-Zag fashion
- Remove character
- Number of occurrence
- k largest elements
- Minimum difference pair
- Find the Odd Occurence
- Keypad typing
- Rotate by 90 degree
- Reverse each word in a given string
- Sort in specific order
- Minimize sum of alternate product
- Index of first 1 in a sorted array of 0’s and 1’s
- Arranging the array
- Extract Maximum
- Check set bits
- Twice counter
- Longest Common Prefix in an Array
- Total number of Strings
- How Many X's?
- Height of Binary Tree
- Finding middle element in a linked list
- Circular Linked List
- Implement Stack using Linked List
- Square root

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Overall Coding Score: 3384

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- Frequency of Array Elements
- Anagram
- Number of Unique Paths
- Wave Array
- Pattern Searching
- Print Pattern
- Rotation
- Search in a Rotated Array
- Maximize Toys
- Non Repeating Character
- Distinct Substrings
- Good Pairs
- Count Occurences of Anagrams
- Reverse words in a given string
- Count Substrings
- Move all zeroes to end of array
- Remove all duplicates from a given string
- Activity Selection
- Remove “b” and “ac” from a given string
- Equal Sum and Product
- Spirally traversing a matrix
- Sort an array of 0s, 1s and 2s
- Maximum value in a bitonic array
- Next greater number set digits
- Finding Position
- Next sparse binary number
- 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
- Sum of Query I
- N meetings in one room
- Remove minimum elements
- Remove Duplicates
- Addition of submatrix
- Maximum sum increasing subsequence
- Array to BST
- Facing the sun
- Max Sum without Adjacents
- Key Pair
- Inversion of array
- Maximum Difference
- Product array puzzle
- Reverse Bits
- Count Smaller elements
- Lucky Number
- Swap bits
- Swap all odd and even bits
- Max rope cutting
- Count pairs with given sum
- Inorder Traversal and BST
- Cycle Race
- Cutting Rectangles
- AND operation
- Segregate 0s and 1s
- Copy Set Bits in Range
- Triplet Sum in Array
- Dearrangement of balls
- Next in Series
- Rectangles in a Circle
- Sum of GCDs
- Moving on grid
- Overlapping rectangles
- Possible paths
- Minimum element in a sorted and rotated array
- Search in a matrix
- Maximum Collatz sequence length
- Fibonacci Sum
- Cross the Bridge
- Number of 1's in smallest repunits
- Chinky and diamonds
- Shop in Candy Store
- Check If two Line segments Intersect
- Largest number possible
- Arrange the Balls
- Pick values
- Missing element of AP
- Count the Zeros
- Distinct absolute array elements
- 0 - 1 Knapsack Problem
- Longest Common Increasing Subsequence
- Integral Points In Triangle
- Count number of disjoint subsets
- Trail of ones
- The Prime Twins
- Find the number of sub-arrays having even sum
- Pallindrome Patterns
- Valid Substring
- Count the Reversals
- Right most non zero digit
- Last Match
- Next Prime Palindrome
- Smallest number subset
- Minimum number of swaps needed
- Number of distinct subsequences
- Game of Death in a circle
- Help Mommy out
- Power of Numbers
- Examination Papers
- Next larger element
- Ordering of strings
- Area of intersection of two circles
- Change Bits
- Count number of substrings
- Crack the series
- Maximum value
- Raju and coins
- Largest number with given sum
- GCD and Fibonacci Numbers
- Non Fibonacci Number
- Collection of pens
- The Nth Fibonnaci
- Permutation with Spaces
- Element appearing once
- Floor in a Sorted Array
- Finding Profession
- Maximize Dot Product
- Flip Bits
- Missing number in matrix
- Finding the numbers
- Sort by Set Bit Count
- Optimal walk
- Least Prime Factor
- Left or Right Positioned Array
- Collecting Trees
- Game of cells
- Modified Fibonacci
- Choose and Swap
- Geometric Progression
- Equal 0, 1 and 2
- Adding Ones
- Min Number of Flips
- Kaprekar Number
- Keith Number
- Lucas Number
- Deficient Number
- Mr. Binary
- 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
- String Manipulation
- Minimum Steps
- Help Nobita
- Maximum 0’s between two immediate 1’s
- Coverage of all Zeros in a Binary Matrix
- Chocolate Distribution Problem
- Binary Tree K level sum
- Exit Point in a Matrix
- 1[0]1 Pattern Count
- Make Zeroes
- Let's Play!!!
- Sum of k smallest elements in BST
- A Game of 2
- Find sum of divisors
- Smallest factorial number
- Last non-zero digit in factorial
- Flood fill Algorithm
- Tom and String
- Save The Nation
- Kth Prime factor of a Number
- Longest K unique characters substring
- Roman Number to Integer
- 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
- Game of XOR
- Find largest word in dictionary
- Trace Path
- Love For The Twins
- Sum of all substrings of a number
- Recaman’s sequence
- Minimum Operations
- Find all pairs with a given sum
- Check if frequencies can be equal
- Shortest distance in infinite tree
- Palindromic patitioning
- Meta Strings
- Check if palindromic ignoring spaces
- Rahul and his Villa
- Matrix Game - 1
- Race in Fooland
- Excel Sheet | Part - 2
- Geeky Year
- Smallest window in a string containing all the characters of another string
- Find the string in grid
- Largest Fibonacci Subsequence
- Theft at World Bank
- Longest Palindromic Subsequence
- Fractional Knapsack
- K-th element of two sorted Arrays
- Evaluation of Postfix Expression
- Maximum difference Indexes
- Common elements
- Recursive sequence
- Rod Cutting
- Subset with no pair sum divisible by K
- Efficiently sorting numbers in range from 0 to n^2 - 1
- ADA Noise
- Sequence of Sequence
- 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
- Unique substrings
- Merge two binary Max heaps
- Find the highest occurring digit in prime numbers in a range
- Paths to reach origin
- Subarray with 0 sum
- Faulty wiring and Bulbs
- Rotate matrix elements clockwise
- Nth catalan number
- Subarray range with given sum
- Group Anagrams Together
- Find the closest prime number to a given number
- Sum equals to Sum
- Find Pair Given Difference
- Carry counter
- Count the elements
- Second most repeated string in a sequence
- Reverse vowels in a given string
- Sort the given array after applying the given equation
- k sorted array
- Mr. Modulo and Arrays
- Greedy Fox
- 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
- Divisibility by 999
- BBT counter
- Corners of a Rectangle
- Primes sum
- Fibonacci Expression
- Swapping pairs make sum equal
- Number and the Digit Sum
- Toppers Of Class
- 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
- Minimum insertions to sort an array
- Minimum steps to delete a string
- Minimum number of deletions.
- Closest Strings
- Replace a word
- 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
- Nth item through sum
- Number of subsequences in a string divisible by n
- Missing Point of a Parallelogram
- Size of array after repeated deletion of LIS
- Broken blocks
- Sum of Divisors in an array
- Count binary strings
- Ways to write n as sum
- Minimum indexed character
- Printing Maximum Sum Increasing Subsequence
- Find minimum adjustment cost of an array
- High-effort vs. Low-effort
- Bell Numbers
- Compute sum of digits in all numbers from 1 to n
- Minimum Swaps for Bracket Balancing
- Primitive Typing
- k-th smallest number using digits of a given number
- Maximum Product Cutting
- Power Set
- Find the most frequent digit
- Merging two unsorted arrays in sorted order
- Transform the array
- Power Of 2 and Subsequences
- Sum of Lengths of Non-Overlapping SubArrays
- Equalize the Towers
- Maximum possible sum
- Primorial of a number
- Kth LSB
- Common Subsequence
- K-Ary Tree
- Adding Array Elements
- Boundary Elements of Matrix
- Query and Array
- Count the triplets
- Sub-arrays with equal number of occurences
- Min Manipulations to make Strings Anagram
- Completing tasks
- Chicks in a Zoo
- Sort the way !
- Special Numbers
- Carol Numbers
- Check if a Integer is power of 8 or not
- Geek and its Game of Coins
- Maximize XOR
- Prime number of set bits
- Check if divisible by 10
- Make a string from another string
- Divisible by 7
- Reversing the equation
- Maximum prefix sum for a given range
- Express N as sum of 4 prime numbers
- Convertible string
- Numbers containing 1, 2 and 3
- Modified Numbers and Queries
- Ana and Sweets
- Incomplete Array
- Sum Indexes
- Count Primes In Range
- Three Number Even Sum
- GeeksforGeeks New System
- Set all the bits in given range of a number
- Cereals Box
- Beautiful Sequence
- 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
- Count of substrings containing K ones
- Next Happy Number
- Summed Matrix
- Morning Assembly
- Missing Intervals
- Fact Digit Sum
- Non-Repeating Element
- Find if string is K-Palindrome or not
- Closing bracket index
- Chandler and Joey
- Pairs which are Divisible by 4
- Maximum AND Value
- Gambling Stark
- Split the Array
- Telephone Number or Involution Number
- Find winner of the Game of Nim
- Geek and his Binary Strings
- Smallest subarray with all occurrences of a most frequent element
- 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
- The Palindrome Pattern
- Swap the closest and farthest digits
- Remove leading zeros from an IP address
- Add two numbers represented by two arrays
- Word with maximum frequency
- 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
- Winner of an election where votes are represented as candidate names
- C++ Alternate words in reverse order.
- Extra Perfect Numbers
- Rope Cutting
- Villain Con
- Numbers with prime frequencies greater than or equal to k
- 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
- Print Binary Tree levels in sorted order
- 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
- Ishaan and Sticks
- Mysterious Series
- Find the closest pair from two arrays
- 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
- Ishaan's Curiosity
- Charul and vessels
- 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
- 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
- Palindromic Series
- Print binomial expansion series
- 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
- Ishaan's Birthday
- Variation in Nim Game
- Sorting all array elements except one
- Smallest number with sum of digits as N and divisible by 10^N
- Reaching the heights
- Delete array elements which are smaller than next or become smaller
- Mansi and her series
- The Wedding Date
- Smallest greater elements in whole array
- Eulerian Path in an Undirected Graph
- Connell Sequence
- Product of Prime Factors
- Ordered Prime Signature
- Fitting The Array
- Archana and her tricky string
- Are you "Perfect"
- XOR Cipher
- Print adjacency list
- Pair with given sum in a sorted array
- 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
- 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
- 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
- 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
- Run Length Encoding
- Largest subarray of 0's and 1's
- Level order traversal Line by Line
- Print BST elements in given range
- Largest subarray with 0 sum
- 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
- Get minimum element from stack
- Equilibrium index of an array
- Unique rows in boolean matrix
- Remove every k'th node
- Leaf at same level
- Is Binary Tree Heap
- Subtraction in Linked List
- Match specific pattern
- Multiply two linked lists
- C++ STL | Set 2 (pair)
- Sum of subset differences
- Josephus problem
- Expression Tree
- Maximum Difference
- Check if Linked List is Palindrome
- Max distance between same elements
- Print matrix in diagonal pattern
- Longest Consecutive Subsequence
- 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
- 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
- Sort a stack
- 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
- 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
- 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
- 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
- Maximum Node Level
- Children Sum Parent
- Diagonal Sum In Binary Tree
- Find length of Loop
- Deletion and Reverse in Linked List
- Change of Key in BST
- Median of 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
- Count Odd Even
- Need Some Change
- Matrix Interchange
- Predict the Column
- Xoring and Clearing
- Even Subsets
- Find the Frequency
- Back to Front
- Pair Sum in Vector
- Student of the Year
- Get min at pop
- Deque Implementations
- Min Heap implementation
- Multimap Operations
- Mother Vertex

- Coin Change
- Kadane's Algorithm
- Find Missing And Repeating
- Complement
- Sum Of Prime
- Rank The Permutations
- Excel Sheet | Part - 1
- Maximum Sub Array
- Print Diagonally
- Overlapping Intervals
- Maximum Index
- Equal Sum
- Next Permutation
- Longest Increasing Subsequence
- Arithmetic Progression
- Parenthesis Checker
- 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
- 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
- Subset Sum Problem
- Maximize The Array
- Factorials of large numbers
- Number of Coins
- Minimum Platforms
- Number following a pattern
- Find Prime numbers in a range
- Stock buy and sell
- Largest Number formed from an Array
- 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
- Rearrange Array Alternately
- Rearrange an array with O(1) extra space
- Concatenation of Zig-Zag String in ‘n’ Rows
- Relative Sorting
- Black and White
- Maximum of all subarrays of size k
- Largest square formed in a matrix
- Row with max 1s
- Boolean Matrix Problem
- 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
- Stock span problem
- 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
- Fill up buckets
- 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
- Number of pairs
- Smallest Sub-Array
- Product of Primes
- Coin Piles
- Satisfy the equation
- Total number of Equal Partition
- Maximum XOR subset
- Maximum Profit
- Minimum sum
- Digit multiplier
- 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
- Rubik's Cube
- Taking 1 out of 3 consecutives
- X Total Shapes
- Total Decoding Messages
- Unique BST's
- Distinct Transformations
- Subsets
- Matchsticks game
- 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
- Hamiltonian Path
- Sonam Bewafa asks questions
- Count the Number of Full Binary Trees
- Minimums in Array
- Mathematical manipulation
- Snake and Ladder Problem
- Recursively remove all adjacent duplicates
- 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
- Unit Area 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
- K
^{th}largest element in a stream - Water Overflow
- Zero Sum Subarrays
- 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
- Infix to Postfix
- Optimal binary search tree
- Smallest Absolute Difference
- Geek collects the balls
- Largest Sum Subarray of Size at least K
- Find minimum s-t cut in a flow network
- 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
- First Digit
- Number of palindromic strings
- Top k numbers in a stream
- 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
- In First But Second
- Smith Number
- Mail System Design
- Row with minimum number of 1's
- 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
- 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
- Challenge by Nikitasha
- Pasha and Primes
- Sick Pasha
- Beautiful SubSequence
- The Fibonacci-prime number
- Santa Banta
- The Tiny Miny
- Letters Collection
- Big Numbers Series
- Hopscotch
- Sum of XOR of all pairs
- Save Winterfell
- Marks of PCM
- Pass the semester
- String Conversion
- Grouping Of Numbers
- Nitika and her queries
- Geek and Strings
- Water Connection Problem
- Container with most water
- Save Gotham!
- Buying Vegetables
- The Painter's Partition Problem
- Aditya and his building blocks
- 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
- Part of it.
- Rahul and The Lift
- Lucky alive person in a circle
- count special palindromic
- Akku and Arrays
- Rat Maze With Multiple Jumps
- Construct binary palindrome by repeated appending and trimming
- Element left after performing alternate OR & XOR operation
- Range Queries for Longest Correct Bracket Subsequence
- Castle RUN
- Smaller on Left
- Possible paths between 2 vertices
- 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
- Tree from Postorder and Inorder
- Bottom View of Binary Tree
- Delete without head pointer
- 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
- Boundary 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
- The Celebrity Problem
- Topological sort
- Print a Binary Tree in Vertical Order
- Merge K sorted linked lists
- Find the number of islands
- Serialize and Deserialize a Binary Tree
- 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
- LRU Cache
- Box Stacking
- Count Palindromic Subsequences
- Multiply two strings
- Minimum Swaps to Sort
- Count of distinct substrings
- Strongly Connected Components (Kosaraju's Algo)
- 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
- Merge k Sorted Arrays
- Length of longest palindrome in linked list
- Bridge Edge in Graph
- Print Nodes having K leaves
- 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
- Leaves to DLL
- Largest Independent Set Problem
- 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
- Largest Sum Contiguous Subarray in Range
- Path Count in Directed Graph
- C++ Friend function
- C++ Generic sort
- Swap Kth node from Beginning and Kth node from end in a singly linked list
- Add two numbers represented by Linked List

- Minimum Points To Reach Destination
- Minimum sum partition
- Maximum of minimum for every window size
- Head to Tail ordering
- Merge Two Sorted Arrays
- Find sum of different corresponding bits for all pairs
- Return two prime numbers
- Largest rectangle of 1’s with swapping of columns allowed
- Rohan's Love for Matrix
- Longest valid Parentheses
- Solve the Sudoku
- Find median in a stream
- Very Tough Problem
- Distinct palindromic substrings
- Count the subarrays having product less than k
- Joey doesn't share food
- Queries on a Matrix
- Doctor Strange
- Kill Captain America
- QuickSort on Doubly Linked List
- Reorder List
- Binary Tree to DLL
- Longest Palindromic Substring in Linear Time
- Nodes at given distance in binary tree
- Fixing Two nodes of a BST
- Number of Turns in Binary Tree