#include<bits/stdc++.h> using namespace std; int main(){ /**char a; cin>>a; if(a>='A'&&a<='Z') cout<<char(a+32); if(a>='a'&&a<='z') cout<<char(a-32);**/ int n,x,y; cin>>n>>x>>y; if(y/x>=n){ cout<<0; }else{ if(y % x ==0) cout<<n - y/x; else cout<<n -y/x-1; } return 0; }