#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; }