Featured Lists Top 20 Problems on Dynamic programming Top 10 Problems on Backtracking Top 20 Problems on Graph Top 25 Problems on Trees Top 10 Problems on Bits Manipulation Top 15 Problems in LinkedList All Problems # Status Problem video Level Completes Likes 323 How to Reverse Text: Stack Method for String Reversal Beginner % 0 307 Swap two numbers using Bitwise XOR Operator Medium % 1 298 Left Shift (<<) and Right Shift (>>) Operators Beginner % 1 271 Snake and Ladder Problem Hard % 1 270 Weighted Graph Implementation – JAVA Beginner % 1 268 Topological Sort Medium % 1 264 Graph Implementation – Adjacency List - Better| Set 2 Beginner % 0 254 Sum of all sub arrays in O(n) Time Hard % 0 246 Dynamic programming – Minimum Jumps to reach to end Hard % 0 228 Find the only element in array which appears only once Beginner % 1 199 Dynamic Programming - Maximum Subarray Problem Medium % 0 198 Kadane's Algorithm - Maximum Subarray Problem Medium % 1 188 Shortest Range in K-sorted Lists Hard % 1 184 Get the Sum of all left leaves in a Binary tree Beginner % 1 179 Binary Tree Deletion Beginner % 0 176 Find the Size of a Binary Tree without Recursion Beginner % 0 175 Dynamic Programming — Longest Palindromic Subsequence Hard % 1 172 Dynamic Programming - Longest Common Substring Medium % 0 171 Dynamic Programming - Longest Common Subsequence Medium % 0 168 Dynamic Programming - Minimum Cost Path Problem Medium % 1 149 Backtracking - Rat In A Maze Puzzle Hard % 0 139 Find Missing Numbers in Sequences - XOR Method Beginner % 1 135 Find Paths with Sum in Binary Tree Medium % 0 132 Find the Deepest Node in a Binary Tree Medium % 1 112 Generate All n-Bit Binary Strings Medium % 1 111 Find Unique Number in Array with Duplicates (Except One) Beginner % 1 97 Construct Binary Search Tree from a given Preorder Traversal using Recursion Hard % 0 93 Inorder Predecessor and Successor in Binary Search Tree Hard % 0 68 Transforming a Binary Tree into its Mirror Image Beginner % 0 67 Printing Nodes without Siblings in a Binary Tree Beginner % 0 66 Convert a Sorted Doubly Linked List to Balanced BST Medium % 1 62 In a Binary Tree, Check if Two nodes has the same parent or are siblings Medium % 0 61 Determine If Two Nodes are Cousins Medium % 0 44 Inorder Successor in Binary Tree Medium % 0 38 Determining Binary Tree Balance Medium % 0 How to Reverse Text: Stack Method for String Reversal Swap two numbers using Bitwise XOR Operator Left Shift (<<) and Right Shift (>>) Operators Snake and Ladder Problem Weighted Graph Implementation – JAVA Topological Sort Graph Implementation – Adjacency List - Better| Set 2 Sum of all sub arrays in O(n) Time Dynamic programming – Minimum Jumps to reach to end Find the only element in array which appears only once Dynamic Programming - Maximum Subarray Problem Kadane's Algorithm - Maximum Subarray Problem Shortest Range in K-sorted Lists Get the Sum of all left leaves in a Binary tree Binary Tree Deletion Find the Size of a Binary Tree without Recursion Dynamic Programming — Longest Palindromic Subsequence Dynamic Programming - Longest Common Substring Dynamic Programming - Longest Common Subsequence Dynamic Programming - Minimum Cost Path Problem Backtracking - Rat In A Maze Puzzle Find Missing Numbers in Sequences - XOR Method Find Paths with Sum in Binary Tree Find the Deepest Node in a Binary Tree Generate All n-Bit Binary Strings Find Unique Number in Array with Duplicates (Except One) Construct Binary Search Tree from a given Preorder Traversal using Recursion Inorder Predecessor and Successor in Binary Search Tree Transforming a Binary Tree into its Mirror Image Printing Nodes without Siblings in a Binary Tree Convert a Sorted Doubly Linked List to Balanced BST In a Binary Tree, Check if Two nodes has the same parent or are siblings Determine If Two Nodes are Cousins Inorder Successor in Binary Tree Determining Binary Tree Balance 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
