https://youtu.be/HkDcN_6pGKI

#include <iostream>

using namespace std;

int main()
{
    int N, score;
    while(cin>>N)
    {
        if(N >= 40)
            cout << 100;
        else if(N >= 20)
            cout << 60 + N;
        else if(N > 10)
            cout << 40 + 2*N;
        else
            cout << 6*N;
        cout << endl;
    }
    return 0;
}