#include <cstdio>
int f(int n){return n*(n-1)/2;}
int main()
{
	int T;
	scanf("%d",&T);
	while(T--)
	{
		int n;
		scanf("%d",&n);
		int ans=n-2;
		if(n%2==0)ans=ans+f((n-2)/2)*2;		
		else ans=ans+f((n-3)/2)+f((n-3)/2+1);
		printf("%d\n",ans);
	}
	return 0;
}