代码.docx

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,x,y,chi=0;
    cin>>n>>x>>y;
    if(y%x==0){
        chi=y/x;
    }else{
        chi=y/x+1;
    }
    if(n-chi<=0){
        cout<<0;
    }else{
        cout<<n-chi;
    }
	return 0;
}