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

int main() {
    int tt;
    cin >> tt;
    while (tt--) {
        int n;
        cin >> n;
        if (n % 2 == 0) {
            cout << n / 2 << endl;
        } else {
            cout << -(n + 1) / 2 << endl;
        }
    }
    return 0;
}