B. Chess Tournament.cpp

#include <bits/stdc++.h>
 
using namespace std;
 
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL); 
  int t;
  cin >> t;
  while (t--) {
    int n;
    string s;
    cin >> n >> s;
    vector<int> id;
    for (int i = 0; i < n; ++i) if (s[i] == '2')
      id.push_back(i);
    int k = id.size();
    if (k == 1 || k == 2) {
      cout << "NO\n";
      continue;
    }

    vector<string> t(n, string(n, '='));

      for (int i = 0; i < n; ++i) t[i][i] = 'X';
      for (int i = 0; i < k; ++i) {
        int x = id[i], y = id[(i + 1) % k];
        t[x][y] = '+';
        t[y][x] = '-';
      }
    cout << "YES\n";
    for (int i = 0; i < n; ++i) cout << t[i] << '\n';
  }
}

/*

The matrix element in the i-th row and j-th column should be equal to:

+, if the i-th player won in a game against the j-th player;
-, if the i-th player lost in a game against the j-th player;
=, if the i-th and j-th players' game resulted in a draw;
X, if i=j.

*/