def f(x, A):
    B = [x for x in range(24, 91)]
    C = [x for x in range(47, 116)]
    return (x in C) <= (((not(x in A)) and (x in B)) <= (not(x in C)))
A = []
for i in range(1, 1000):
    A.append(i)
    if all(f(x, A) == 1 for x in range(0, 10_000)):
        break
    else:
        A.remove(i)
print(len(A))