# Status Problem video Level Completes Likes
156

Backtracking - N Queens Problem

Hard % 0
149

Backtracking - Rat In A Maze Puzzle

Hard % 0
148

Solve Sudoku Puzzles with Backtracking

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
139

Find Missing Numbers in Sequences - XOR Method

Beginner % 1
137

Populate Next Right Pointers in Each Node

Hard % 0
135

Find Paths with Sum in Binary Tree

Medium % 0
134

Diameter Of a Binary Tree

Hard % 1
133

Reverse Level Order Traversal of Binary Trees

Medium % 0
132

Find the Deepest Node in a Binary Tree

Medium % 1
130

Find and Print Full Nodes in a Binary Tree

Beginner % 0
129

Binary Min-Max Heap Implementation

Hard % 0
127

Numbers Palindrome in Both Decimal and Octal

Beginner % 0
126

Generate All Permutations of a String (Well-Ordered)

Medium % 0
124

Create a Specific Triangle Pattern from an Array

Beginner % 0
123

Colorful Numbers

Hard % 3
122

Goldbach's Conjecture

Beginner % 0
120

Convert Decimal to Irreducible Fraction (Simplified Form)

Beginner % 0
119

Clock Angle Problem

Beginner % 1
117

Stack with Max Tracking: Find the Largest Element (Optimized)

Medium % 1
116

Generate All Balanced Parentheses Combinations (N Pairs)

Medium % 1
113

Towers Of Hanoi

Beginner % 0
112

Generate All n-Bit Binary Strings

Medium % 1
111

Find Unique Number in Array with Duplicates (Except One)

Beginner % 1
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
103

Delete X Nodes After Y Nodes In a Linked List

Beginner % 0

Backtracking - N Queens Problem

Backtracking - Rat In A Maze Puzzle

Solve Sudoku Puzzles with Backtracking

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

Find Missing Numbers in Sequences - XOR Method

Populate Next Right Pointers in Each Node

Find Paths with Sum in Binary Tree

Diameter Of a Binary Tree

Reverse Level Order Traversal of Binary Trees

Find the Deepest Node in a Binary Tree

Find and Print Full Nodes in a Binary Tree

Binary Min-Max Heap Implementation

Numbers Palindrome in Both Decimal and Octal

Generate All Permutations of a String (Well-Ordered)

Create a Specific Triangle Pattern from an Array

Colorful Numbers

Goldbach's Conjecture

Convert Decimal to Irreducible Fraction (Simplified Form)

Clock Angle Problem

Stack with Max Tracking: Find the Largest Element (Optimized)

Generate All Balanced Parentheses Combinations (N Pairs)

Towers Of Hanoi

Generate All n-Bit Binary Strings

Find Unique Number in Array with Duplicates (Except One)

Alternate Splitting of a given Linked List

Reverse a Doubly-Linked List (In-place Algorithm)

Swapping Nodes in a Linked List (Kth Position)

Delete X Nodes After Y Nodes In a Linked List