def part_1(data):
    target = 2017
    steps = int(data)
    xs = [0]
    i = 0
    for n in range(1, target + 1):
        i = (i + steps) % len(xs)
        xs.insert(i + 1, n)
        i += 1

    for j in range(len(xs)):
        if xs[j] == target:
            print(xs[j + 1])
            return


def part_2(data, m=50_000_000):
    steps = int(data)
    len_xs = 1
    last_zero = None
    i = 0
    for n in range(1, m + 1):
        i = (i + steps) % len_xs
        if i == 0:
            last_zero = n
        len_xs += 1
        i += 1
    return last_zero

def main():
    data = open(0).read().strip()
    part_1(data)
    assert part_2(data, 1000) == 531
    assert part_2(data, 10000) == 2616
    print(part_2(data))


if __name__ == "__main__":
    main()