NET1 C++

#include<bits/stdc++.h>
using namespace std;
 
int a,t;
int main()
{
    cin>>a;
    if(a<=60) t=80*a;
    else 
        if(a<=120) t=(a-60)*50+60*80;
        else t=60*80+60*50+(a-120)*30;
    cout<<t;
}