# Status Problem video Level Completes Likes 426 Check if Graph is Bipartite - Adjacency List using Depth-First Search(DFS) Hard 0.00 % 0 416 Evaluation of Prefix Expressions (Polish Notation) | Set 2 Medium 0.00 % 0 410 Evaluation of Prefix Expressions (Polish Notation) | Set 1 Medium 0.00 % 0 390 Convert Prefix to Postfix Expression Medium 0.00 % 0 387 Convert Postfix to Prefix Expression Medium 0.00 % 0 377 Convert Postfix to Infix Expression Medium 0.17 % 0 371 Convert Infix to Prefix Expression Medium 0.17 % 0 368 Max Flow Problem - Ford-Fulkerson Algorithm Hard 0.17 % 0 365 Convert Infix to Postfix Expression Medium 0.17 % 0 363 Evaluation of Infix expressions Medium 0.17 % 0 361 Convert Prefix to Infix Expression Medium 0.00 % 0 346 Valid Brackets – Part 2 | Stack Method Beginner 0.34 % 0 280 Graph – Find Cycle in Undirected Graph using Disjoint Set (Union-Find) Hard 0.00 % 0 275 Graph – Detect Cycle in a Directed Graph using colors Hard 0.17 % 0 274 Graph – Detect Cycle in an Undirected Graph using DFS Medium 0.17 % 0 273 Graph – Detect Cycle in a Directed Graph Medium 0.34 % 1 271 Snake and Ladder Problem Hard 0.34 % 1 261 Sliding Window Algorithm (Track the maximum of each subarray of size k) Hard 0.17 % 0 194 Introduction to Threaded Binary Tree Medium 0.00 % 0 165 Generate all combinations of length N Hard 0.17 % 0 161 The Word Break Problem Hard 0.34 % 0 158 Backtracking - Search a Word In a Matrix Hard 0.34 % 0 116 Generate All Balanced Parentheses Combinations (N Pairs) Medium 0.51 % 1 106 Reverse a Doubly-Linked List (In-place Algorithm) Medium 0.17 % 0 99 Construct a binary tree from given Inorder and Level Order Traversal Hard 0.17 % 0 48 Determining Whether a Given Binary Tree is a Binary Search Tree (BST) Medium 0.51 % 1 Check if Graph is Bipartite - Adjacency List using Depth-First Search(DFS) Evaluation of Prefix Expressions (Polish Notation) | Set 2 Evaluation of Prefix Expressions (Polish Notation) | Set 1 Convert Prefix to Postfix Expression Convert Postfix to Prefix Expression Convert Postfix to Infix Expression Convert Infix to Prefix Expression Max Flow Problem - Ford-Fulkerson Algorithm Convert Infix to Postfix Expression Evaluation of Infix expressions Convert Prefix to Infix Expression Valid Brackets – Part 2 | Stack Method Graph – Find Cycle in Undirected Graph using Disjoint Set (Union-Find) Graph – Detect Cycle in a Directed Graph using colors Graph – Detect Cycle in an Undirected Graph using DFS Graph – Detect Cycle in a Directed Graph Snake and Ladder Problem Sliding Window Algorithm (Track the maximum of each subarray of size k) Introduction to Threaded Binary Tree Generate all combinations of length N The Word Break Problem Backtracking - Search a Word In a Matrix Generate All Balanced Parentheses Combinations (N Pairs) Reverse a Doubly-Linked List (In-place Algorithm) Construct a binary tree from given Inorder and Level Order Traversal Determining Whether a Given Binary Tree is a Binary Search Tree (BST) 1
