# Status Problem video Level Completes Likes 439 Determine the given routing number belong to which bank Medium % 0 436 Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N Medium % 0 426 Check if Graph is Bipartite - Adjacency List using Depth-First Search(DFS) Hard % 0 421 Sort a given stack - Using Recursion Hard % 1 416 Evaluation of Prefix Expressions (Polish Notation) | Set 2 Medium % 0 410 Evaluation of Prefix Expressions (Polish Notation) | Set 1 Medium % 0 402 Check if Arithmetic Expression contains duplicate parenthesis Medium % 0 401 Introduction to Bipartite Graphs OR Bigraphs Medium % 0 398 Smallest Number after Removing K digits Hard % 0 396 Optimizing Test Execution: Managing Test Dependencies for Sequential Order Medium % 0 392 Reverse a Stack using recursion - In Place (Without using extra memory) Hard % 1 390 Convert Prefix to Postfix Expression Medium % 0 388 Sort a given stack - Using Temporary Stack Medium % 0 387 Convert Postfix to Prefix Expression Medium % 0 386 Convert Integer to Roman Medium % 0 384 Grouping of Anagrams Medium % 0 377 Convert Postfix to Infix Expression Medium % 0 371 Convert Infix to Prefix Expression Medium % 0 368 Max Flow Problem - Ford-Fulkerson Algorithm Hard % 0 365 Convert Infix to Postfix Expression Medium % 0 Determine the given routing number belong to which bank Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N Check if Graph is Bipartite - Adjacency List using Depth-First Search(DFS) Sort a given stack - Using Recursion Evaluation of Prefix Expressions (Polish Notation) | Set 2 Evaluation of Prefix Expressions (Polish Notation) | Set 1 Check if Arithmetic Expression contains duplicate parenthesis Introduction to Bipartite Graphs OR Bigraphs Smallest Number after Removing K digits Optimizing Test Execution: Managing Test Dependencies for Sequential Order Reverse a Stack using recursion - In Place (Without using extra memory) Convert Prefix to Postfix Expression Sort a given stack - Using Temporary Stack Convert Postfix to Prefix Expression Convert Integer to Roman Grouping of Anagrams Convert Postfix to Infix Expression Convert Infix to Prefix Expression Max Flow Problem - Ford-Fulkerson Algorithm Convert Infix to Postfix Expression 1 2 3 4 5 6 7 8