#include <cstdio>
#include <cassert>
using namespace std;
 
#define TLIMIT 100000
#define NLIMIT 1000000000
int main() {
	int t;
	scanf("%d", &t);
	assert(1 <= t && t <= TLIMIT);
	while(t--) {
		int n;
		scanf("%d", &n);
		assert(1 <= n && n <= NLIMIT);
		long long m = n/2;
		long long answer = m*m;
		answer -= ((m * (m+1))/2);
		printf("%lld\n", answer);
	}
}