def fromDecToBase(a, base):
    s = ''
    a_copy = a
    while(a_copy > 0):
        s += str(a_copy % base)
        a_copy //= base
    s = s[::-1]
    return s


def fromBaseToDec(a, base):
    result = 0
    a_copy = a[::-1]
    for i in range(len(a_copy)):
        result += int(a_copy[i]) * (base**i)
    return result


base = 3
for i in range(100000):
    s = fromDecToBase(i, base)
    s += str(i%base)
    res = fromBaseToDec(s, base)
    if (res >= 1000 and res < 10000):
        print(res)
        break
# Without functions
for i in range(100000):
    s = ''
    a_copy = i
    while(a_copy > 0):
        s += str(a_copy % 3)
        a_copy //= 3
    s = s[::-1]
    s += str(i%3)
    result = 0
    s = s[::-1]
    for j in range(len(s)):
        result += int(s[j]) * (3**j)
    if (result >= 1000 and result < 10000):
        print(result)
        break