目录case 1case 2case 3前提：列表有序！！！ bisect()和bisect_right()等同，那下面就介绍bisect_left()和bisec_right()的区别！
I have two versions of a piece of text and I want to produce an HTML view of its revision similar to what Google Docs or Stack Overflow displays.I need to do this in Python.I don\'t know what this tec
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