# Status Problem video Level Completes Likes 527 In a number, add digits until it becomes a single digit Beginner % 1 495 Print all nested directories and files in a given directory - Recursion Medium % 0 484 Print all subarrays using recursion Medium % 1 468 Given an array, find all unique subsets with a given sum with allowed repeated digits. Medium % 0 467 Print all steps to convert one string to another string Medium % 0 465 Find all subsets of size K from a given number N (1 to N) Medium % 0 463 Find all possible combinations with sum K from a given number N(1 to N) with the repetition of numbers is allowed Medium % 0 457 Given an array, print all unique subsets with a given sum. Medium % 0 454 Find all unique combinations of numbers (from 1 to 9 ) with sum to N Medium % 0 445 Depth-First Search (DFS) in 2D Matrix/2D-Array - Recursive Solution Beginner % 1 442 Find the number of distinct Islands OR connected components. Hard % 0 440 Given an array, Print sum of all subsets Beginner % 1 436 Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N Medium % 0 428 Collatz Conjecture - Maximum Steps takes to transform (1, N) to 1. Medium % 0 427 Number of Islands using BFS Medium % 0 422 Print Stack in reverse order. Beginner % 0 419 Print all subsets of an array with a sum equal to zero Medium % 0 408 Number of Islands Medium % 1 407 Minimum No of operations required to convert a given number to 1 - Integer Replacement Problem. Medium % 0 399 Round Price Problem Hard % 0 392 Reverse a Stack using recursion - In Place (Without using extra memory) Hard % 1 376 Collatz Conjecture - Steps to transform Number to 1 Beginner % 0 353 Reverse a given number – Java Code Beginner % 1 343 Generate all the strings of length n from 0 to k-1. Medium % 0 308 Print Numbers from 1 to N without using loop Beginner % 0 290 Reverse a String using Recursion Beginner % 0 280 Graph – Find Cycle in Undirected Graph using Disjoint Set (Union-Find) Hard % 0 267 Graph – Depth First Search using Recursion Beginner % 1 253 Print all subarrays of a given array Medium % 0 252 Text Justification Problem (OR Word Wrap Problem) Hard % 0 249 Divide and Conquer - Rearrange array elements in special order Medium % 0 233 Find the local minima in a given array Medium % 0 231 Check if array is sorted using recursion Beginner % 0 222 Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer Hard % 0 221 Maximum difference between two elements where larger element appears after the smaller element Medium % 0 In a number, add digits until it becomes a single digit Print all nested directories and files in a given directory - Recursion Print all subarrays using recursion Given an array, find all unique subsets with a given sum with allowed repeated digits. Print all steps to convert one string to another string Find all subsets of size K from a given number N (1 to N) Find all possible combinations with sum K from a given number N(1 to N) with the repetition of numbers is allowed Given an array, print all unique subsets with a given sum. Find all unique combinations of numbers (from 1 to 9 ) with sum to N Depth-First Search (DFS) in 2D Matrix/2D-Array - Recursive Solution Find the number of distinct Islands OR connected components. Given an array, Print sum of all subsets Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N Collatz Conjecture - Maximum Steps takes to transform (1, N) to 1. Number of Islands using BFS Print Stack in reverse order. Print all subsets of an array with a sum equal to zero Number of Islands Minimum No of operations required to convert a given number to 1 - Integer Replacement Problem. Round Price Problem Reverse a Stack using recursion - In Place (Without using extra memory) Collatz Conjecture - Steps to transform Number to 1 Reverse a given number – Java Code Generate all the strings of length n from 0 to k-1. Print Numbers from 1 to N without using loop Reverse a String using Recursion Graph – Find Cycle in Undirected Graph using Disjoint Set (Union-Find) Graph – Depth First Search using Recursion Print all subarrays of a given array Text Justification Problem (OR Word Wrap Problem) Divide and Conquer - Rearrange array elements in special order Find the local minima in a given array Check if array is sorted using recursion Maximum Subarray OR Largest Sum Contiguous Subarray Problem – Divide and Conquer Maximum difference between two elements where larger element appears after the smaller element 1 2 3 4 5
