#include<bits/stdc++.h>
using namespace std;

int main() {
  int t;
  cin >> t;
  while (t--) {
    int n; cin >> n;
    if (n % 2 == 0) cout << n / 2 << '\n';
    else cout << -((n + 1) / 2) << '\n';
  }
  return 0;
}