def main():
    N = int(input())
    
    route = [0] * (N + 1)
    route[1] = 1

    queue = []
    queue.append(1)

    answer = -1

    while len(queue):
        node = queue.pop(0)

        if node == N:
            answer = route[node]
            break
        
        step = bin(node).count('1')
        prev = node - step
        next = node + step

        if 0 < next <= N and route[next] == 0:
            queue.append(next)
            route[next] = route[node] + 1

        if 0 < prev <= N and route[prev] == 0:
            queue.append(prev)
            route[prev] = route[node] + 1
    
    print(answer)

if __name__ == '__main__':
    main()