✋❄🕯💧 ✌ ❄🕈⚐📫☹✋☠☜

#include <bits/stdc++.h>
using namespace std;int main(){int n,x,y;cin>>n>>x>>y;if (y%x==0){if (n-y/x<=0){cout<<0;}else{cout<<n-y/x;}}else{if (n-(y/x+1)<=0){cout<<0;}else{cout<<n-(y/x+1);}}return 0;}