import std;

void main () {
    int N = readln.chomp.to!int;
    int ans = N / 500;
    N %= 500;
    if (100 <= N) {
        ans++;
    }
    writeln(ans);
}

void read (T...) (string S, ref T args) {
    import std.conv : to;
    import std.array : split;
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}