Problems # Status Problem Level Completes Likes 36 Check if one string is a subsequence of another string. Beginner % 0 37 Most frequent word Beginner % 0 38 Given an array, count the number of pairs with a given sum. Beginner % 0 39 Two Sum Problem Beginner % 0 40 Sum of distinct elements among two given sets Beginner % 0 41 Insert a node in the given sorted linked list. Beginner % 0 42 Print sorted unique elements of a given array Beginner % 0 43 Number of Intervals in which given value lies Beginner % 0 44 Find the sum of overlapping elements in two sets Beginner % 0 45 Given two coordinates, Print the line equation Beginner % 0 46 Print all middle elements of the given matrix/2D array. Beginner % 0 47 Depth-First Search (DFS) in 2D Matrix/2D-Array - Recursive Solution Beginner % 0 48 Given an array, Print sum of all subsets Beginner % 0 49 Hamming Distance between two given integers Beginner % 0 50 Print boundary of given matrix/2D array. Beginner % 0 51 Depth-First Search (DFS) in 2D Matrix/2D-Array - Iterative Solution Beginner % 0 52 Breadth-First Search (BFS) in 2D Matrix/2D-Array Beginner % 0 53 Find all the Armstrong numbers in the given range Beginner % 0 54 Check if the given binary tree is Full or not. Beginner % 0 55 Check if given undirected graph is connected or not Beginner % 0 56 Print Stack in reverse order. Beginner % 0 57 Maximum number edges to make Acyclic Undirected/Directed Graph Beginner % 0 58 Hamming Distance between two given strings Beginner % 0 59 Check if Number is divisible by its digits Beginner % 0 60 Check if the given number is Armstrong number or not Beginner % 0 61 Find all the numbers in the range which has prime set bits. Beginner % 0 62 Reverse the Directed Graph Beginner % 0 63 Find Third Smallest elements in a given array Beginner % 0 64 Find the maximum number present in a String Beginner % 0 65 Count number of subgraphs in a given graph Beginner % 0 66 Convert Roman Number to Integer Beginner % 0 67 Linear Search vs Binary Search Beginner % 0 68 Count the number of nodes in a given binary tree Beginner % 1 69 Longest contiguous character in a given String - O(N) Solution Beginner % 0 70 Collatz Conjecture - Steps to transform Number to 1 Beginner % 0 Check if one string is a subsequence of another string. Most frequent word Given an array, count the number of pairs with a given sum. Two Sum Problem Sum of distinct elements among two given sets Insert a node in the given sorted linked list. Print sorted unique elements of a given array Number of Intervals in which given value lies Find the sum of overlapping elements in two sets Given two coordinates, Print the line equation Print all middle elements of the given matrix/2D array. Depth-First Search (DFS) in 2D Matrix/2D-Array - Recursive Solution Given an array, Print sum of all subsets Hamming Distance between two given integers Print boundary of given matrix/2D array. Depth-First Search (DFS) in 2D Matrix/2D-Array - Iterative Solution Breadth-First Search (BFS) in 2D Matrix/2D-Array Find all the Armstrong numbers in the given range Check if the given binary tree is Full or not. Check if given undirected graph is connected or not Print Stack in reverse order. Maximum number edges to make Acyclic Undirected/Directed Graph Hamming Distance between two given strings Check if Number is divisible by its digits Check if the given number is Armstrong number or not Find all the numbers in the range which has prime set bits. Reverse the Directed Graph Find Third Smallest elements in a given array Find the maximum number present in a String Count number of subgraphs in a given graph Convert Roman Number to Integer Linear Search vs Binary Search Count the number of nodes in a given binary tree Longest contiguous character in a given String - O(N) Solution Collatz Conjecture - Steps to transform Number to 1 1 2 3 4 5 6 7