#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int n,x,y;
cin>>n>>x>>y;
cout<<n-ceil(1.0*y/x);
return 0;
}

#include<stdio.h>
using namespace std;
int main(){
    int n, x, y;
    scanf("%d%d%d", &n, &x, &y);
    printf("%d", n - y/x - (y%x != 0));
    return 0;
}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int n,x,y,t,rest;
cin>>n>>x>>y;
t=ceil((double)y/x);
if (t<n) rest=n-t;
else rest=0;
cout<<rest<<endl;
return 0;
}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int n,x;
double y;
cin>>n>>x>>y;
cout<<n-ceil(y/x);
return 0;
}