CodeChef_Graph_Easy_Problem_Code:SEARGP_

#include <iostream>
#include <stdio.h>

using namespace std;


int main()
{
    int T;
    int n, m;

    cin >> T;

    while(T--)
    {
        cin >> n >> m;

        int grp[n][m];
        int arr[m+1];
        for(int i=0; i<n; i++)
        {
            cout  << "Enitialising arr[" << i+1 << "] : " ;
            arr[i] = 0;
            cout << arr[i] << endl;
            for(int j = 0; j<m; j++)
            {
                cout  << "Enitialising grp[" << i << "]" << "[" << j <<"] : ";
                grp[i][j] = 0;
                cout << grp[i][j] << endl;
                //grp[j][i] = 0;
            }
        }


        for(int i=0; i<n; i++){
            for(int j=0; j<m; j++){
                cout << grp[i][j] << "\t";
            }
            cout << endl;
        }
        cout << endl;


        int a, b, i, flag=1;
        for(i=0; i<m; i++)
        {
            cin >> a >> b;
            grp[a-1][b-1] = 1;
            grp[b-1][a-1] = 1;
            cout  << "Setting grp[" << a-1 << "]" << "[" << b-1 <<"] : ";
            cout << grp[a-1][b-1] << endl;
            cout  << "Setting grp[" << b-1 << "]" << "[" << a-1 <<"] : ";
            cout << grp[b-1][a-1] << endl;

            arr[a-1]++;
            cout <<"arr[" << a-1<<"]: "<< arr[a-1] << endl;

            arr[b-1]++;
            cout <<"arr[" << b-1<<"]: "<< arr[b-1] << endl;

        }



        for(int i=0; i<n; i++){
            for(int j=0; j<m; j++){
                cout << grp[i][j] << "\t";
            }
            cout << endl;
        }
        cout << endl;



        for(int i=0; i<m; i++)
        {
            if(arr[i] == 1)
            {
                cout << "No" << endl;
                flag = 0;
                break;
            }



        }
        if(flag)
        {
            cout << "YES" << endl;
        }

        cout << T << "th loop" << "  " << endl;

    }


    return 0;
}