inp = int(input())

def bitJusawi(goal):
    move = lambda x: list(map(int, list(bin(x)[2:]))).count(1)
    his = [] ; loc = 0; ops = 0; rem = goal - loc
    while goal != loc:
        his.append(loc)
        rem = goal - loc
        if ops == 0:
            ops = 1; loc = 1
        else:
            ops += 1
            rng = move(loc)
            if rem >= rng:
                loc += rng
            else:
                bounce = goal - ((loc + rng) - goal)
                if loc - rng < bounce:
                    loc = bounce
                else:
                    loc -= rng
        cond = []
        for i in range(2,goal//2+1,2):
            if ops >= i:
                h = i // 2
                cond.append(loc == his[-h] == his[-i])
        stuck = any(cond)
        if stuck:
            return -1
    
    return ops

print(bitJusawi(inp))