C++ :

#include<bits/stdc++.h>
using namespace std;
int ans;
int main(){
	int n;
	char y;
	cin>>n>>y;
	if (y=='y') ans+=5;
	n=(n+499)/500;
	if (n<=2) ans+=8;
	else ans+=8+(n-2)*4;
	cout<<ans;
	return 0;
}

Python :

# coding=utf-8
a=int(input())
b=input()
if a<=1000 and b=='n':
    print(8)
if a<=1000 and b=='y':
    print(13)
if a>1000:
    c=a-1000
    d=c//500
    e=d+1
    if b=='n':
       if c%500==0:
           print(8+4*d)
       else:
           print(8+4*e)
    if b=='y':
       if c%500==0:
           print(13+4*d)
       else:
           print(13+4*e)