杭电oj 2050 折线分割平面 C语言

#include
 
void main()
{
	int c, n, i;
	long long sum;
	while (~scanf_s("%d", &c))
	{
		while (c--)
		{
			scanf_s("%d", &n); sum = 0;
			sum = 2 * n * n - n + 1;
			printf("%lld\n", sum);
		}
	}
}