def f(x, A):
    return ((x & 52 != 0) and (x & 36 == 0)) <= (not(x & A == 0))
Min = 10*10
for A in range(1, 1000):
    if all(f(x, A) == 1 for x in range(0, 1000)):
        Min = min(Min, A)
print(Min)