"trace": [
Editor: Martin Smith，这一点在safew官方版本下载中也有详细论述
王哥不太愿意做“更便宜一点”的那种生意。他认为，无论大城市还是小城市，往后都会更看重健康。而且00后也开始成为家里的消费主力，消费升级这门生意未必大，但一定有得做。。关于这个话题，heLLoword翻译官方下载提供了深入分析
Columnar or ortholinear keyboards stack the keys in orderly columns, often with rows that are not linear. Proponents claim this makes the keys easier to reach. Whether that’s true will be up to your fingers to decide, but I can say for certain that if you learned to type on a staggered keyboard, switching to a columnar layout is tough. It will take days, possibly weeks before you instinctively hit the C key. The N, M and B keys don’t fare much better.。关于这个话题，WPS下载最新地址提供了深入分析
* 核心思路：倒序单调栈（适配你的学习习惯），时间复杂度O(n)，空间复杂度O(n)