def main():
    N = int(input())
    q = [1]
    c = 1
    r = set([])
    while q:
        l = []
        for i in q:
            if i == N:
                print(c)
                return
            elif not i in r:
                r.add(i)
                b = bin(i).count('1')
                n, m = i+b, i-b
                if n <= N : l += [n]
                if m > 0 : l += [m]
        q = l
        c += 1
    print(-1)
    return

if __name__ == '__main__':
    main()