def double(n):
    return 2*n

def minus(n):
    return n-1
        
    

x=1
i=0
N=int(input())


while N%2==0:
    N=N/2
    i+=1
while x<N:
    x=double(x)
    i+=1
while x>N:
    x=minus(x)
    i+=1

print('%d'%i)