def maxsumit(iterable):
    maxseq = seq = []
    start, end, sum_start = -1, -1, -1
    maxsum_, sum_ = 0, 0
    for i, x in enumerate(iterable):
        seq.append(x); sum_ += x
        if maxsum_ < sum_:
            maxseq = seq; maxsum_ = sum_
            start, end = sum_start, i
        elif sum_ < 0:
            seq = []; sum_ = 0
            sum_start = i
    assert maxsum_ == sum(maxseq[:end - start])
    return maxseq[:end - start]