N = int(input())
v = [i for i in range(N)]
is_visited = [False for i in range(N)]
for i in range(2): is_visited[i] = True
is_reached = False
count = 1
    
que = []
que.append(2)
while len(que) > 0:
    v_i = que.pop(0)
    count += 1
    if v_i == N:
        is_reached = True
        break
    else:
        step = bin(v_i).count("1")
        if v_i+step <= N and is_visited[v_i+step-1] == False:
            is_visited[v_i+step-1] = True
            que.append(v_i+step)
        elif v_i-step > 0 and is_visited[v_i-step-1] == False:
            is_visited[v_i-step-1] = True
            que.append(v_i-step)

if is_reached: print(count)
else: print(-1)