#include<bits/stdc++.h> using namespace std; int main() { long long a; cin>>a; if(a<10000){ cout<<'0'; } if(a>=10000&&a<=29999){ cout<<a*3/100; } if(a>29999&&a<=49999){ cout<<a*7/100; } if(a>49999){ cout<<(a-1000)*13/100; } return 0; }