5

for i in range(0, 10000):
    a = str(i)
    a += a[-1]
    a_bin = bin(int(a))[2:]
    if a_bin.count('1') % 2 == 0:
        a_bin += '0'
    else:
        a_bin += '1'
    if int(a_bin, 2) > 105:
        print(int(a_bin, 2))
        break