Stable Marriage Problem – Gale–Shapley Algorithm – Java
Stable Marriage Given N men and N women and the marriage preference order for each man and woman. Their marriage will be stable when these men and women marry in such a manner so...
Category: Expert
Check if Graph is Bipartite – Adjacency List using Breadth-First Search(BFS)
Objective: Given a graph represented by the adjacency List, write a Breadth-First Search(BFS) algorithm to check whether the graph is bipartite or not. Earlier we have solved the same problem using Depth-First Search (DFS)....
Articulation Points OR Cut Vertices in a Graph
Objective: Given a graph, write an algorithm to find all the articulation points or cut vertices. Articulation Points: In a graph, a vertex is called an articulation point if removal of that vertex (along...
Find the number of distinct Islands OR connected components.
Objective: Given a 2d grid map of ‘1’s (land) and ‘0’s (water), count the number of distinct or unique islands. Island: An island is surrounded by water and is formed by connecting adjacent lands...
Print All Paths in Dijkstra’s Shortest Path Algorithm
Objective: Given a graph and a source vertex write an algorithm to find the shortest path from the source vertex to all the vertices and print the paths all well. Example: We strongly recommend reading...
Check if Graph is Bipartite – Adjacency List using Depth-First Search(DFS)
Objective: Given a graph represented by the adjacency List, write a Depth-First Search(DFS) algorithm to check whether the graph is bipartite or not. Earlier we have solved the same problem using Adjacency Matrix (Check...
Sort a given stack – Using Recursion
Objective: Given a stack of integers, write an algorithm to sort the stack using recursion. Example: Original Stack: [14, 9, 67, 91, 101, 25] Sorted Stack: [9, 14, 25, 67, 91, 101] Original Stack:...
Social Network Problem
Given: There are N people in a social network and there are friends group. Each person can be part of a friend group of a specific size. Number of people in the social network...
Check if Graph is Bipartite – Adjacency Matrix using Depth-First Search(DFS)
Objective: Given a graph represented by the adjacency matrix, write a Depth-First Search(DFS) algorithm to check whether the graph is bipartite or not. Bipartite Graphs OR Bigraphs is a graph whose vertices can be...
Round Price Problem
Problem Statement: When customers book an Airbnb the total price, which includes base price + service fee + cleaning fee. all these prices are in decimals. Write an algorithm to round each price such...
Smallest Number after Removing K digits
Objective: Given a number with N digits, write a program to get the smallest number possible after removing k digits from number N. OR Implement a method that returns the lowest possible number that...
Reverse a Stack using recursion – In Place (Without using extra memory)
Objective: Given a Stack, write an algorithm to reverse the stack. Example: Original Stack: [14, 9, 67, 91, 101, 25] Reversed Stack: [25, 101, 91, 67, 9, 14] Approach: Use Recursion In this solution,...
K-Means Algorithm
The algorithm of kMeans is an unsupervised learning algorithm for clustering a set of items into groups. Given a set of multi-dimensional items and a number of clusters, k, we are tasked of categorizing...
Least Recently Used (LRU) Cache – Using LinkedHashSet and Deque | Set 2
Objective: Design and Implement a data structure Least Recently Used (LRU) Cache. Earlier we had seen Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List. In this article, we will see...
Least Recently Used (LRU) Cache – Using HashMap and Doubly Linked List | Set 1
Objective: Design and Implement a data structure Least Recently Used (LRU) Cache. Least Recently Used (LRU) Cache: You have given a cache (or memory) capacity. The cache will be filled with items you will...