#include <iostream>
using namespace std;
int main() {
int JOI = 1000;
int money[6] = { 500,100,50,10,5,1 };
int n;
cin >> n;
n = 1000 - n;
int i = 0;
int cnt = 0;
while (true)
{
if (n >= money[i])
{
cnt++;
n -= money[i];
}
else
i++;
if (n == 0)
break;
}
cout << cnt;
}