#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; }