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 227 Algorithm to calculate power(k,n). Beginner % 1 224 Number of 1’s in bit representation of a number Beginner % 1 222 Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer Hard % 0 221 Identifying Maximum Gain from Sequential Elements Medium % 0 220 Find the right most unset bit OR zero bit of a number Beginner % 1 219 Find the two repeating elements in a given array | 6 Approaches Medium % 1 218 Find the right most set bit of a number Beginner % 1 217 Find two elements whose sum is closest to zero Medium % 1 212 Find the first non repeating character in a given string Beginner % 0 211 Find the first repeating character in a given string Beginner % 0 205 Print All Diagonals of a given matrix Medium % 1 203 Dynamic Programming - Coin In a Line Game Problem Hard % 0 202 Dynamic Programming - Box Stacking Problem Hard % 0 200 Dynamic Programming - Highway Billboard Problem Hard % 0 190 Swap Nodes in pairs in a Linked List by changing links Medium % 0 187 Reverse Alternative 'k' nodes in a Linked List. Medium % 0 186 Reverse a Linked List in groups of given size 'K' Medium % 0 182 Binary Tree-Postorder Traversal - Non Recursive Approach Beginner % 0 181 Binary Tree - Preorder Traversal - Non Recursive Approach Beginner % 0 180 Binary Tree-Inorder Traversal - Non Recursive Approach Beginner % 0 178 Search the Element in a binary tree - With and Without Recursion Beginner % 0 173 Minimize Square Sums: Fewest Perfect Squares to Reach a Target (Dynamic Programming) Hard % 0 165 Generate all combinations of length N Hard % 0 164 Print All Possible Subsets with Sum equal to a given Number Hard % 0 162 Dynamic Programming - Subset Sum Problem Hard % 0 156 Backtracking - N Queens Problem Hard % 0 153 Find the Second Largest Element in an Array Beginner % 1 143 Merge K Sorted Arrays Hard % 0 141 Find the Single Occurrence Element in an Array (Odd One Out) Beginner % 1 137 Populate Next Right Pointers in Each Node Hard % 0 136 Verifying Mirror Binary Trees Beginner % 1 130 Find and Print Full Nodes in a Binary Tree Beginner % 0 119 Clock Angle Problem Beginner % 1 118 Print All Combinations of subset of size K from Given Array Hard % 0 106 Reverse a Doubly-Linked List (In-place Algorithm) Medium % 0 Algorithm to calculate power(k,n). Number of 1’s in bit representation of a number Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer Identifying Maximum Gain from Sequential Elements Find the right most unset bit OR zero bit of a number Find the two repeating elements in a given array | 6 Approaches Find the right most set bit of a number Find two elements whose sum is closest to zero Find the first non repeating character in a given string Find the first repeating character in a given string Print All Diagonals of a given matrix Dynamic Programming - Coin In a Line Game Problem Dynamic Programming - Box Stacking Problem Dynamic Programming - Highway Billboard Problem Swap Nodes in pairs in a Linked List by changing links Reverse Alternative 'k' nodes in a Linked List. Reverse a Linked List in groups of given size 'K' Binary Tree-Postorder Traversal - Non Recursive Approach Binary Tree - Preorder Traversal - Non Recursive Approach Binary Tree-Inorder Traversal - Non Recursive Approach Search the Element in a binary tree - With and Without Recursion Minimize Square Sums: Fewest Perfect Squares to Reach a Target (Dynamic Programming) Generate all combinations of length N Print All Possible Subsets with Sum equal to a given Number Dynamic Programming - Subset Sum Problem Backtracking - N Queens Problem Find the Second Largest Element in an Array Merge K Sorted Arrays Find the Single Occurrence Element in an Array (Odd One Out) Populate Next Right Pointers in Each Node Verifying Mirror Binary Trees Find and Print Full Nodes in a Binary Tree Clock Angle Problem Print All Combinations of subset of size K from Given Array Reverse a Doubly-Linked List (In-place Algorithm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
