to sb

#include<bits/stdc++.h> 
using namespace std; 
int a; 
int main() { 
while (cin >> a) { 
 if (a >= 40) cout << 100; 
 else if (a >= 0 && a <= 10) cout << 6 * a; 
 else if (a >= 11 && a <= 20) cout << 60 + 2 * (a - 10); 
 else if (a >= 21 && a <= 40) cout << 80 + 1 * (a - 20); 
 cout << endl; 
} 
return 0; 
}