#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int> > vec;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    if (n == 1) {
      cout << "0\n";
      continue;
    }
    cout << n - 2 << endl;
  }
}
