Title: 求出最长好子序列 I(Find the Maximum Length of a Good Subsequence I)

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Difficulty: Medium
Tags: 数组(Array)、哈希表(Hash Table)、动态规划(Dynamic Programming)
Link: https://leetcode.com/problems/find-the-maximum-length-of-a-good-subsequence-i
LinkCN: https://leetcode.cn/problems/find-the-maximum-length-of-a-good-subsequence-i