https://zh.apacode.com/post/aaron-took-5-weights-and-arranged-them-in-a-line-starting-from-the-left-side-and-each-time-he-clamped-two-adjacent-weights-and-compared-them-move-the-heavier-weight-to-the-left-and-move-the-lighter-weight-to-the-right-compare-with-the-next-weight