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2019年3月27日

摘要：题目描述 Given n, how many structurally unique BST's (binary search trees) that store values 1 ... n? Example: 解题思路：在给定的序列[1,n]下，我们来构造二叉搜索树，首先对于序列中的每个数我们阅读全文

posted @ 2019-03-27 20:16 星星眨眼睛阅读(90) 评论(0) 推荐(0)

1013. Pairs of Songs With Total Durations Divisible by 60

摘要：题目描述： In a list of songs, the i-th song has a duration of time[i] seconds. Return the number of pairs of songs for which their total duration in secon 阅读全文

posted @ 2019-03-27 19:35 星星眨眼睛阅读(110) 评论(0) 推荐(0)