题的解

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,sum=0;//sum统计邮费
	char b;
	cin>>a>>b;
	if(a<=1000){//特判
		cout<<8;
		return 0;
	}
	sum+=8;
	a-=1000;
	if(a%500==0){
		sum+=a/500*4;
	}else{
		sum+=(a/500+1)*4;//加括号
	}
	if(b=='y'){
		sum+=5;
	}
	cout<<sum;
	return 0;
}