if name == 'main': n = int(input().strip())

n_bin = bin(n)
n_bin = bin(n)
max_consecutive = 0
count_consecutive1 = 0
count_consecutive0 = 0
for i in n_bin:
    if i == '1':
        count_consecutive1 += 1
        if count_consecutive1 > max_consecutive:
            max_consecutive = count_consecutive1
    elif i == '0':
        count_consecutive1 = 0
        count_consecutive0 += 1
        if count_consecutive0 > max_consecutive:
            max_consecutive = count_consecutive0
    else:
        count_consecutive1 = 0
        count_consecutive0 = 0

print(max_consecutive)