第六节 练习9

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>

using namespace std;

int main()
{
    int n,x,y,z;
    cout << "输入：";
    cin >> n >> x >> y;
   
    z = n - ceil(1.0/x * y);
	cout << z;
    return 0;
}
//cout << "输入：";

结果：