def foo(N):
    distance = [bin(_).count('1') for _ in range(N+1)]
    shortest = [N for _ in range(N+1)]
    shortest[1] = 1
    changed = True
    while changed:
        changed = False
        for masu in range(1, N+1):
            dest = masu+distance[masu]
            if dest <= N:
                if shortest[masu]+1 < shortest[dest]:
                    shortest[dest] = shortest[masu]+1
                    changed = True
            dest = masu-distance[masu]
            if dest >= 1:
                if shortest[masu]+1 < shortest[dest]:
                    shortest[dest] = shortest[masu]+1
    return -1 if N!=1 and shortest[N]==N else shortest[N]
print(foo(int(input())))