a = list(range(1, 1024 + 1))
nop = 0
while len(a) > 1:
    nop += 1
    if nop % 2 == 1:
        for i in range(len(a) // 2): a.pop(i)
    else:
        for i in range(1, len(a) // 2 + 1): a.pop(i)
    print(len(a), a)