def main():
    N = int(input())
    foo_list = []

    value = 0
    while 7 ** value < N:
        value += 1

    num_of_digit = value - 1 
    print(num_of_digit)

    for i in range(num_of_digit):
        digit = num_of_digit - i
        value2 = 0
        while (7 ** digit) * value2 < N:
            value2 += 1
        foo_list.append(value2 - 1)
        N = N - (7 ** digit) * (value2 - 1)
    foo_list.append(N)

    for i in foo_list:
        print(i, end='')
    print()


if __name__ == '__main__':
    main()