用ceil函数，向上取整，否则要判断是否为500倍数

#include<bits/stdc++.h>

using namespace std;

int main()
{
	int n, s = 0;
	char x;
	cin >> n >> x;
			
	if(n <= 1000)		
		s = 8;
	else			
		s = 8 + ceil((n - 1000) / 500.0) * 4;
		if (x == 'y')		
			s = s + 5.0;			
		cout << s;			
	return 0;
}