poj 1455 Crazy tea party

#include <iostream>   
#include <stdio.h>   
using namespace std;   
int main()   
{
    int n, t; 
    cin >> t; 
    while (t--) 
    { 
        scanf("%d", &n); 
        int x = n>>1; 
        x -= 1; 
        int ans = x*(x+1)/2; 
        if (n&1) 
            ans = ans + (x+1)*(x+2)/2; 
        else ans = ans<<1; 
        printf("%d\n", ans); 
    } 
    return 0;
}