def Sum(s):
    sum = 0
    for i in range(len(s)):
        sum += int(s[i])
    return sum
for n in range(1, 1000):
    b = bin(n)[2:]
    b = b + str(Sum(b) % 2)
    b = b + str(Sum(b) % 2)
    R = int(b, 2)
    if R > 396:
        print(R)
        break