#include<iostream> using namespace std; int main(){ int n,x,y; cin>>n>>x>>y; if(n == 0){ cout<<0; return 0; } if(y/x >n){ cout<<0; return 0; } if(y%x == 0){ cout<<n-y/x; return 0; } if(y%x!=0){ cout<<n-y/x-1; return 0; } return 0; }