请问为什么只有40qwq？

#include <iostream>
#include <cmath>


using namespace std;

int main() {

	int m, t, s, full_apple;
	double apple;

	cin >> m >> t >> s;
	if (m != 0 && t != 0 && s != 0) {
		apple = s / t;
		full_apple = m - ceil(apple);
	} else {
		full_apple = 0;
	}

	cout << full_apple;

	return 0;
}