n=int(input())

lst = [0]*(n+1)

def f(num,cnt):
    print(num,len(cnt),cnt)
    if num==n:
        print(len(lst))
        return True
    
    step = str(bin(num))[2:].count("1")
    fowd_n = num+step
    back_n = num-step
    
    if fowd_n<=n and fowd_n not in cnt:
        cnt.append(fowd_n)
        if f(fowd_n,cnt):
            return True
    if back_n>0 and back_n not in cnt:
        cnt.append(back_n)
        if f(back_n,cnt):
            return True
    return False
        
if f(1,[1])==False:
    print(-1)