Code : Is Connected ?

 

Given an undirected graph G(V,E), check if the graph G is connected graph or not.

Note:

1. V is the number of vertices present in graph G and vertices are numbered from 0 to V-1. 
2. E is the number of edges present in graph G.
Input Format :
The first line of input contains two integers, that denote the value of V and E.
Each of the following E lines contains two integers, that denote that there exists an edge between vertex a and b.
Output Format :
The first and only line of output contains "true" if the given graph is connected or "false", otherwise.
Constraints :
0 <= V <= 1000
0 <= E <= (V * (V - 1)) / 2
0 <= a <= V - 1
0 <= b <= V - 1
Time Limit: 1 second
Sample Input 1:
4 4
0 1
0 3
1 2
2 3
Sample Output 1:
true
Sample Input 2:
4 3
0 1
1 3 
0 3
Sample Output 2:
false
Sample Output 2 Explanation
The graph is not connected, even though vertices 0,1 and 3 are connected to each other but there isn’t any path from vertices 0,1,3 to vertex 2. 




#include <iostream>
using namespace std;

int main() {
    // Write your code here
}

Comments

Post a Comment

Popular posts from this blog

Code : All connected components

  Given an undirected graph G(V,E), find and print all the connected components of the given graph G. Note: 1. V is the number of vertices present in graph G and vertices are numbered from 0 to V-1. 2. E is the number of edges present in graph G. 3. You need to take input in main and create a function which should return all the connected components. And then print them in the main, not inside function. Print different components in new line. And each component should be printed in increasing order (separated by space). Order of different components doesn't matter. Input Format : The first line of input contains two integers, that denote the value of V and E. Each of the following E lines contains two space separated integers, that denote that there exists an edge between vertex a and b. Output Format : Print different components in new line. And each component should be printed in increasing order of vertices (separated by space). Order of different components doesn't matter....
Read more

Coding Ninjas

  Given a NxM matrix containing Uppercase English Alphabets only. Your task is to tell if there is a path in the given matrix which makes the sentence “CODINGNINJA” . There is a path from any cell to all its neighbouring cells. For a particular cell, neighbouring cells are those cells that share an edge or a corner with the cell. Input Format : The first line of input contains two space separated integers N and M, where N is number of rows and M is the number of columns in the matrix. Each of the following N lines contain M characters. Please note that characters are not space separated. Output Format : Print 1 if there is a path which makes the sentence “CODINGNINJA” else print 0. Constraints : 1 <= N <= 1000 1 <= M <= 1000 Time Limit: 1 second Sample Input 1: 2 11 CXDXNXNXNXA XOXIXGXIXJX Sample Output 1: 1 bool hasPath ( vector < vector < char >> & board , int n , int m ) { // Write your code here. } #include < iostream > #include ...
Read more