## Find K vertices in the graph which are connected to at least one of remaining vertices

Given a connected graph with N vertices. The task is to select k(k must be less than or equals to n/2, not necessarily minimum) vertices… Read More »

Given a connected graph with N vertices. The task is to select k(k must be less than or equals to n/2, not necessarily minimum) vertices… Read More »

Given an integer X and an array arr[] of length N consisting of positive integers, the task is to pick minimum number of integers from… Read More »

Breadth First Search BFS stands for Breadth First Search is a vertex based technique for finding a shortest path in graph. It uses a Queue… Read More »

Given two strings s1 and s2 of same length, the task is to count the minimum number of pairs of characters (c1, c2) such that… Read More »

Given a 2d-matrix mat[][] consisting of positive integers, the task is to find the minimum number of steps required to reach the end of the… Read More »

Given an integer array arr[] of length N consisting of positive integers, the task is to minimize the number of steps required to reach the… Read More »

Given a boolean 2D matrix, find the number of islands. A group of connected 1s forms an island. For example, the below matrix contains 5… Read More »

Given a binary tree, write a function that returns true if the tree satisfies below property: For every node, data value must be equal to… Read More »

Given a binary grid of order r * c and an initial position. The task is to find the minimum distance from the source to… Read More »

Given a connected graph with N vertices and M edges. The task is to print the lexicographically smallest BFS traversal of the graph starting from… Read More »

Given an adjacency list representation of a directed graph, the task is to find the path from source to every other node in the graph… Read More »

Given an N X M matrix, where ai, j = 1 denotes the cell is not empty, ai, j = 0 denotes the cell is… Read More »

Given an N-ary tree, print all the levels with odd and even number of nodes in it. Examples: For example consider the following tree 1… Read More »

Given a directed graph, check whether the graph contains a cycle or not. Your function should return true if the given graph contains at least… Read More »

There are a total of n tasks you have to pick, labeled from 0 to n-1. Some tasks may have prerequisites, for example to pick… Read More »