#include<iostream> using namespace std; int main(){ double x; cin>>x; if(x<10000){ cout<<"0"; }else if(x>=10000&&x<30000){ cout<<(int)(x*0.03); }else if(x>=30000&&x<50000){ cout<<(int)(x*0.07); }else{ cout(int)((x-1000)*0.13); } return 0; }