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565.数组嵌套
2022-07-17 18:13:00 【51CTO】
首先想到的是直接暴力遍历,以数组中每一个元素为起点,看最远能走多远:
一顿操作,直接超时。
思考一下,直接遍历会有很多重复的操作。
如果某个元素已经出现过了,那么就不用再看它了。
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