codeforce round 720

​​ https://codeforces.com/contest/1521/problem/B​​

#include <iostream>
#include <cmath>
using namespace std;

int main () {

  
  int t;
  cin >> t;
  while (t --) {
    int res = 1e9 + 7, pos = -1;
    int n;
    cin >> n;
    for (int i = 0; i < n; i ++) {
      int a;
      cin >> a;
      if (a < res) res = a, pos = i;
    }
    cout << n - 1 << endl;
    for (int i = 0; i < n; i ++) {
      if (i == pos) continue;
      cout << pos + 1 << " " << i +  1 << " " << res << " " << res + abs (i - pos) << endl;
    }
  }
  return 0;
  
}