1.3-15:苹果和虫子

#include<iostream>
#include<math.h>
using namespace std;
int main()
{
	int n,x,y;
	cin>>n>>x>>y;
	double a=(double)y/x;
	int b=ceil(a);
	int ans=n-b;
	cout<<ans;
	return 0;
}