import heapq
def bitsugoroku(N,cur=1,path=None):
    h = []
    heapq.heappush(h,[N,cur,[]])
    while len(h) > 0:
        N,cur,path = heapq.heappop(h)
        if cur not in path:
            path.append(cur)
            if N == cur:
                return len(path)
            a = str(bin(cur)).count("1")#移動する数
            if (cur + a <= N) and (cur + a) not in path:
                cur +=a
                heapq.heappush(h,[N,cur,path])
            if (cur - a > 1) and (cur -a) not in path:
                cur -=a
                heapq.heappush(h,[N,cur,path])
    return -1

N = int(input())
print(bitsugoroku(N))