import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    n = int(input())
    c = 0
    while n != 1:
        c += 1
        if n % 2 == 1:
            n += 1
        else:
            n //= 2
    return c


if __name__ == '__main__':
    ret = main()
    if ret is not None:
        print(ret)