N = input()
been = [-1] + [1] + [-1] * N
locations = [1]

while locations:
    loc = locations.pop(0)
    width = bin(loc).count('1')
    move_r, move_l = loc + width, loc-width
    if move_r <= N:
        if been[move_r] == -1:
            been[move_r] = been[loc] + 1
            locations.append(move_r)
    if move_l >= 1 and been[move_l] == -1:
        been[move_l] = been[loc] + 1
        locations.append(move_l)
    if been[N] != -1:
        print been[N]
        exit()

print -1