import sys

sys.setrecursionlimit(999999999)


def count_element_numbers(int_list: list[int]) -> dict[int, int]:
    """
    Counts the occurrences of each integer in the input list.
    Example: count_element_numbers([1, 1, 3, 2, 2, 2, 4, 4, 4, 4]) => {1: 2, 2: 3, 3: 1, 4: 4}
    """
    from itertools import groupby

    result = {}
    for key, group in groupby(sorted(int_list)):
        count = len(list(group))
        result[key] = count
    return result


def solve():
    n = int(input())
    r1 = n // 500
    if n - r1 * 500 <= 100:
        print(r1)
    else:
        print(r1 + 1)



solve()