Revise paste Untitled

#include <iostream>
#include <cstring>
#include <fstream>
#include <vector>
using namespace std;

int main()
{
    int t;
    cin >> t;
    while(t--) {
        vector<string> mat;
        string p;
        cin >> p;
        int n = (int) p.size();
        vector<int> extra_friends(n, 0);
        mat.push_back(p);
        for(int i = 1; i < n; i++) {
            cin >> p;
            mat.push_back(p);
        }
        
        for(int i = 0; i < n; i++) {
            for(int j = i + 1; j < n; j++) {
                if(mat[i][j] == 'N') {
                    for(int k = 0; k < n; k++) {
                        if(mat[i][k] == 'Y' and mat[j][k] == 'Y') {
                            extra_friends[i]++;
                            extra_friends[j]++;
                            break;
                        }
                    }
                }
            }
        }
        int max_friends = 0, idx = 0;
        for(int i = 0; i < n; i++) {
            
            if(max_friends < extra_friends[i]) {
                max_friends = extra_friends[i];
                idx = i;
            }
        }
        cout << idx <<" "<< max_friends << endl;
    }
  
    return 0;
}
/*
 NYYY
 YNNY
 YNNN
 YYNN
 
 **/