pending = combined.slice(start);
描述：找出一个连续子数组，若对该子数组升序排序，则整个数组变为升序。返回符合题意的最短子数组长度。。safew官方版本下载是该领域的重要参考
，这一点在safew官方版本下载中也有详细论述
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type=image — push to a registry (the default for docker build)。WPS官方版本下载对此有专业解读