a053: Sagit's 計分程式 FYI: https://yunlinsong.blogspot.com/2016/02/sagit.html

a053.cpp

#include <iostream>
using namespace std;

int main() {
    int n;
	int s;
    while(cin >> n)
	{
		if(n <= 10)
		{
			s = 6 * n;
		}
		else if(n <= 20)
		{
			s = 60 + 2 * (n-10);
		}
		else if(n <= 40)
		{
			s = 80 + n - 20;
		}
		else
		{
			s = 100;
		}
		
		cout << s << endl;
    }
	
    return 0;
}