def func(num, base):
    num_copy = num
    num_str = ''
    while num > 0:
        num_str += str(num % base)
        num //= base
    num_str = str(num_copy % base) + num_str
    R = 0
    for i in range(len(num_str)):
        R += int(num_str[i])*(base**i)
    return R

for i in range(1, 10000000):
    res = func(i, 3)
    if (res >= 1000) and (res < 10000):
        print(res)
        break