#include <stdio.h>
int m, t, s, a;
int main()
{
	scanf("%d%d%d", &m, &t, &s);
	a = s / t;
	if (t == 0 || a>m)
	{
		printf("0");
		return 0;
	}
	else if (s%t != 0 && t != 0)
	{
		printf("%d",m - (a + 1));
		return 0;
	}
	else if(s%t == 0 && t != 0)
	{
		printf("%d",m - a);
		return 0;
	}
	return 0;
}