#include <iostream>

using namespace std;

int main() {

int a,b;

while(cin>>a){

if(a<=10){

b=a*6;

cout<<b<<endl;

}

else if(a>=11&&a<=20){

b=(a-10)*2+60;

cout<<b<<endl;

}

else if(a>=21&&a<=40){

b=(a-20)*1+80;

cout<<b<<endl;

}

else{

cout<<"100"<<endl;

}

}

return 0;

}