2021年3月28日
1209. Remove All Adjacent Duplicates in String II
摘要： Given a string s, a k duplicate removal consists of choosing k adjacent and equal letters from s and removing them causing the left and the right side 阅读全文
posted @ 2021-03-28 23:49 北叶青藤 阅读(79) 评论(0) 推荐(0)
678. Valid Parenthesis String
摘要： Given a string s containing only three types of characters: '(', ')' and '*', return true if s is valid. The following rules define a valid string: An 阅读全文
posted @ 2021-03-28 23:32 北叶青藤 阅读(79) 评论(0) 推荐(0)
1038. Binary Search Tree to Greater Sum Tree
摘要： Given the root of a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus 阅读全文
posted @ 2021-03-28 06:52 北叶青藤 阅读(53) 评论(0) 推荐(0)