#include <iostream> using namespace std; int main() { long long x; cin>>x; long long tax=0; if(x>=10000&&x<=29999){ tax=x*3/100; }else if(x>=30000&&x<=49999) { tax= x*7/100; }else if(x>=50000){ tax=(x-1000)*13/100; } cout<<tax<<endl; return 0; }