Z 函数（扩展 KMP）【力扣周赛 383】

视频中用到的网站 https://personal.utdallas.edu/~besp/demo/John2010/z-algorithm.htm
字符串 abababzabababab
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题解 + Python/Java/C++/Go 代码：
Q1 https://leetcode.cn/problems/ant-on-the-boundary/solution/tong-ji-qian-zhui-he-zhong-de-0-de-ge-sh-fh1u/
Q2 https://leetcode.cn/problems/minimum-time-to-revert-word-to-initial-state-i/solution/on-zuo-fa-by-endlesscheng-wubs/
Q3 https://leetcode.cn/problems/find-the-grid-of-region-average/solution/yue-du-li-jie-pythonjavacgo-by-endlessch-pcnd/
Q4 https://leetcode.cn/problems/minimum-time-to-revert-word-to-initial-state-ii/solution/z-han-shu-kuo-zhan-kmp-by-endlesscheng-w44j/