hdu 4627 The Unsolvable Problem

#include<stdio.h>
#define LL __int64
int main()
{
int T;
LL n,s;
scanf("%d",&T);
while(T--)
{
scanf("%I64d",&n);
if(n==2){
printf("1\n");
continue;
}
if(n%2){
printf("%I64d\n",(n/2)*(n/2+1));
continue ;
}else {
s=n/2;
if(s%2){
printf("%I64d\n",(s-2)*(s+2));
continue;
}else {
printf("%I64d\n",(s-1)*(s+1));
continue;
}
}
}
return 0;
}