# Status Problem video Level Completes Likes 156 Backtracking - N Queens Problem Hard % 0 155 Find the Kth Smallest/Largest Element in an Array Using Heap Beginner % 0 153 Find the Second Largest Element in an Array Beginner % 1 149 Backtracking - Rat In A Maze Puzzle Hard % 0 146 Dynamic Programming - Stairs Climbing Puzzle Beginner % 1 145 Dynamic Programming - Minimum Coin Change Problem Medium % 1 143 Merge K Sorted Arrays Hard % 0 141 Find the Single Occurrence Element in an Array (Odd One Out) Beginner % 1 140 Rearrange Array Elements (A[i] = i) | In-place Approach Medium % 0 137 Populate Next Right Pointers in Each Node Hard % 0 136 Verifying Mirror Binary Trees Beginner % 1 135 Find Paths with Sum in Binary Tree Medium % 0 134 Diameter Of a Binary Tree Hard % 1 132 Find the Deepest Node in a Binary Tree Medium % 1 131 Find the Height of a tree without using Recursion Medium % 0 130 Find and Print Full Nodes in a Binary Tree Beginner % 0 128 Magic Index - Find Index In Sorted Array Such That A[i] = i Beginner % 0 127 Numbers Palindrome in Both Decimal and Octal Beginner % 0 126 Generate All Permutations of a String (Well-Ordered) Medium % 0 125 Find the Increasing Triplet Sub-sequence in an array Medium % 0 121 Print All the Subsets of a Given Set (Power Set) Hard % 1 119 Clock Angle Problem Beginner % 1 118 Print All Combinations of subset of size K from Given Array Hard % 0 117 Stack with Max Tracking: Find the Largest Element (Optimized) Medium % 1 116 Generate All Balanced Parentheses Combinations (N Pairs) Medium % 1 108 Queue with Stacks: Efficient Implementation Using Stack Operations Medium % 0 107 Alternate Splitting of a given Linked List Medium % 0 106 Reverse a Doubly-Linked List (In-place Algorithm) Medium % 0 105 Swapping Nodes in a Linked List (Kth Position) Medium % 0 104 Print the Bottom View of a Binary Tree Medium % 0 103 Delete X Nodes After Y Nodes In a Linked List Beginner % 0 101 Merge a Linked list into another Linked List at Alternate Positions Medium % 0 96 Print The Top View of a Binary Tree Medium % 0 93 Inorder Predecessor and Successor in Binary Search Tree Hard % 0 92 Check if Array Contains All Elements Of Some Given Range Medium % 0 Backtracking - N Queens Problem Find the Kth Smallest/Largest Element in an Array Using Heap Find the Second Largest Element in an Array Backtracking - Rat In A Maze Puzzle Dynamic Programming - Stairs Climbing Puzzle Dynamic Programming - Minimum Coin Change Problem Merge K Sorted Arrays Find the Single Occurrence Element in an Array (Odd One Out) Rearrange Array Elements (A[i] = i) | In-place Approach Populate Next Right Pointers in Each Node Verifying Mirror Binary Trees Find Paths with Sum in Binary Tree Diameter Of a Binary Tree Find the Deepest Node in a Binary Tree Find the Height of a tree without using Recursion Find and Print Full Nodes in a Binary Tree Magic Index - Find Index In Sorted Array Such That A[i] = i Numbers Palindrome in Both Decimal and Octal Generate All Permutations of a String (Well-Ordered) Find the Increasing Triplet Sub-sequence in an array Print All the Subsets of a Given Set (Power Set) Clock Angle Problem Print All Combinations of subset of size K from Given Array Stack with Max Tracking: Find the Largest Element (Optimized) Generate All Balanced Parentheses Combinations (N Pairs) Queue with Stacks: Efficient Implementation Using Stack Operations Alternate Splitting of a given Linked List Reverse a Doubly-Linked List (In-place Algorithm) Swapping Nodes in a Linked List (Kth Position) Print the Bottom View of a Binary Tree Delete X Nodes After Y Nodes In a Linked List Merge a Linked list into another Linked List at Alternate Positions Print The Top View of a Binary Tree Inorder Predecessor and Successor in Binary Search Tree Check if Array Contains All Elements Of Some Given Range 1 2 3 4 5 6 7
