题解 | #KiKi和酸奶#

#include<stdio.h>

int main()
{
	int n, h, m, x, r;
	scanf("%d %d %d", &n, &h, &m);
	if (m <= n * h)
	{
		x = m % h;
		if (x > 0 && x < 5)
		{
			r = m / h + 1;
			printf("%d", n - r);
		}
		else
		{
			r = m / h;
			printf("%d", n - r);
		}
	}
	return 0;
}