keepshuatishuati - 博客园

2017年8月22日

摘要： 1. Multiplication length are sum of two lengths. 2. Multiplied value should be ADDED to the position not REPLACE since there could be other places mul 阅读全文

posted @ 2017-08-22 14:29 keepshuatishuati 阅读(121) 评论(0) 推荐(0) 编辑

LeetCode 78: Subsets

摘要： For streaming processing, we could use number to set as recorder of last state. Normal recursion: 阅读全文

posted @ 2017-08-22 13:22 keepshuatishuati 阅读(140) 评论(0) 推荐(0) 编辑

2017年8月21日

LeetCode 98: Valid Binary Search Tree

摘要： This answer is so awesome!! 阅读全文

posted @ 2017-08-21 15:00 keepshuatishuati 阅读(72) 评论(0) 推荐(0) 编辑

LeetCode 341: Flatten Nested List Iterator

摘要： 1 Remember : Always make integer validation at hasNext() since it is too late to validate it at next(). 阅读全文

posted @ 2017-08-21 13:53 keepshuatishuati 阅读(79) 评论(0) 推荐(0) 编辑

LeetCode 59: Merge Intervals

摘要： 1. Has to be sorted if originally not sorted. 2. When merge end point, it could be totally covered instead of intersect. 阅读全文

posted @ 2017-08-21 13:33 keepshuatishuati 阅读(87) 评论(0) 推荐(0) 编辑

LeetCode 139: Word Break

摘要： class Solution { public boolean wordBreak(String s, List wordDict) { if (s == null || s.length() == 0) { return false; } boolean[] canBreak = new bool... 阅读全文

posted @ 2017-08-21 12:56 keepshuatishuati 阅读(87) 评论(0) 推荐(0) 编辑

LeetCode 211: Add and Search Word

摘要： 1. When dot happened, each path should be scanned. 2. Each node will not contain any current char info. 阅读全文

posted @ 2017-08-21 12:44 keepshuatishuati 阅读(110) 评论(0) 推荐(0) 编辑

2017年8月20日

LeetCode 257: Binary Tree Paths

摘要： 1. If use StringBuilder as path recorder, do not just remove ONE since it could be multi-digits number. 2. Remember to construct string with "->" if i 阅读全文

posted @ 2017-08-20 11:15 keepshuatishuati 阅读(99) 评论(0) 推荐(0) 编辑

2017年8月16日

LeetCode 15: 3 Sum

摘要： Note: Only skip same jk when the prev sums up to 0. Otherwise, there is no need to skip. 阅读全文

posted @ 2017-08-16 07:29 keepshuatishuati 阅读(92) 评论(0) 推荐(0) 编辑

2017年8月10日

LeetCode 10: Regular Expression Match

摘要： Recursive method: DP: 阅读全文

posted @ 2017-08-10 12:55 keepshuatishuati 阅读(102) 评论(0) 推荐(0) 编辑