#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; if(n<10000) cout<<"0"; else if(n>=10000||n<=29999) cout<<(int(n*0.03)); else if(n>=30000||n<=49999) cout<<(int(n*0.07)); else if(n>=50000) cout<<(int((n-1000)*0.13)); return 0; }