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BASIC (12)
EASY (47)
MEDIUM (106)
HARD (8)
- Reverse a linked list
- Inorder Traversal
- Kth from End of Linked List
- Middle of a Linked List
- Delete Middle of Linked List
- Remove Duplicates from a Sorted Linked List
- Postorder Traversal
- DFS of Graph
- Stack using Linked List
- Insert a node in a BST
- BFS of graph
- Postorder from Inorder and Preorder
- Remove Duplicates Sorted Array
- Level Order Line by Line
- Search a node in BST
- Array Duplicates
- Counting Sort
- Step by Step Condition
- Swap the array elements
- Pair Sum in Vector
- Power of 2
- Count 1's in binary array
- Print adjacency list
- Intersection of Arrays with Distinct
- Missing And Repeating
- Pairs which are Divisible by 4
- k sorted array
- Maximize sum after K negations
- Search in a Row-Column sorted matrix
- Chocolate Distribution Problem
- Find Pair Given Difference
- Drive the car
- Swap and Maximize
- Two Sum - Pair with Given Sum
- Check if array is sorted
- Segregate 0s and 1s
- Length of longest subarray
- Palindrome String
- Shop in Candy Store
- Number of 1 Bits
- Set all the bits in given range of a number
- Geek and his Binary Strings
- Page Faults in LRU
- Check if it is possible to survive on Island
- Tricky Sorting Cost
- Number that are not divisible
- Maximum sum difference
- Nearly Sorted Algorithm
- Rotate a Linked List
- Rearrange a linked list
- Detect Loop in linked list
- Intersection in Y Shaped Lists
- Flattening a Linked List
- Implement stack using array
- Delete a node from BST
- Directed Graph Cycle
- Undirected Graph Cycle
- The Celebrity Problem
- Largest subarray with 0 sum
- Topological sort
- Wildcard Pattern Matching
- Kth smallest element in a Matrix
- Remove loop in Linked List
- Maximum Difference
- Palindrome Linked List
- Count distinct elements in every window
- k-Anagram
- Find triplets with zero sum
- Level order traversal
- Peak element
- Rotate Array
- Kadane's Algorithm
- Majority Element
- Binary Array Sorting
- Count Inversions
- Triplet Sum in Array
- Merge Without Extra Space
- Subarrays with equal 1s and 0s
- Longest Consecutive Subsequence
- Strings Rotations of Each Other
- Stock span problem
- Next Greater Element
- Minimum Cost of ropes
- Fractional Knapsack
- Minimum Platforms
- Largest number in K swaps
- Target Sum Combinations
- M-Coloring Problem
- Egg Dropping Puzzle
- Optimal Strategy For A Game
- Longest Increasing Subsequence
- Longest Common Subsequence
- Kth Smallest
- Shortest Common Supersequence
- Nth Catalan Number
- Count subsequences of type a^i, b^j, c^k
- Overlapping Intervals
- Top K Frequent in Array
- Word Break
- 4 Sum - All Quadruples
- Sort 0s, 1s and 2s
- Equal Sum
- Consecutive 1's not allowed
- Painting the Fence
- Max Score from Subarray Mins
- Subarray Sum Divisible By K
- Maximum Product Subarray
- Row with max 1s
- Check if frequencies can be equal
- Form a palindrome
- Smallest subarray with all occurrences of a most frequent element
- Count the Reversals
- Equal 0, 1 and 2
- Factorials of large numbers
- Length of the longest substring
- Longest Common Substring
- Longest substring with distinct characters
- K-th element of two Arrays
- Rod Cutting
- Minimum swaps and K together
- LCS of three strings
- Largest Sum Subarray of Size at least K
- First negative in every window of size k
- Next higher palindromic number using the same set of digits
- Valid Substring
- Minimum number of deletions
- Permutations of a String
- Friends Pairing Problem
- Unique Number II
- Minimum number of deletions and insertions
- Max Sum Increasing Subsequence
- Sieve of Eratosthenes
- Perfect Sum Problem
- Smallest number
- Power Set
- Knapsack with Duplicate Items
- Partition Equal Subset Sum
- Longest Bitonic subsequence
- Count possible ways to construct buildings
- Probability of Knight
- Digit multiplier
- Subset Sums
- Choose and Swap
- Find nth root of m
- Rotate matrix elements clockwise
- Largest square formed in a matrix
- Pairs of Non Coinciding Points
- Image Multiplication
- Subset Sum Problem
- Rearrange characters
- Count pairs in array divisible by K
- Overlapping Intervals
- Buy Maximum Stocks