#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;
const int N = 2000086, MOD = 998244353, INF = 0x3f3f3f3f;
int n, m, w[N];


char s[N];

int main() {
    cin >> n;
    printf("%d\n", (n - 99 + 500 - 1) / 500);
    return 0;
}