N = int(input())

if N == 1:
    print(1)
else:
    count = 1
    num = 1
    trace = [1]
    result = {1}
    f = False
    while trace:
        n = []
        count += 1
        for num in trace:
            b1 = bin(num).count('1')
            if num + b1 == N:
                print(count)
                f = True
                break
            n1 = num + b1
            n2 = num - b1
            if n1 < N and n1 not in result:
                result.add(n1)
                n.append(n1)
            if n2 > 1 and n2 not in result:
                result.add(n2)
                n.append(n2)
        trace = n
    else:
        if f == False:
            print(-1)