#include<bits/stdc++.h> int main() { int x; scanf("%d",&x); printf("%d",x/5001000+x%500/55); return 0; }

#include<iostream> using namespace std; int main(){ long long x,sum=0; cin>>x; sum+=x/5001000,x%=500,sum+=x/55; cout<<sum; return 0; }