2016 年 11月 26 日随笔档案 - neverlandly

2016年11月26日

Leetcode: Sum of Two Integers && Summary: Bit Manipulation

摘要：转自https://discuss.leetcode.com/topic/49771/java-simple-easy-understand-solution-with-explanation/2，注意里面对于减法的讲解 have been confused about bit manipulati 阅读全文

posted @ 2016-11-26 11:53 neverlandly 阅读(348) 评论(0) 推荐(0)

Leetcode: Max Sum of Rectangle No Larger Than K

摘要： Reference: https://discuss.leetcode.com/topic/48875/accepted-c-codes-with-explanation-and-references/2 The naive solution is brute-force, which is O(( 阅读全文

posted @ 2016-11-26 08:01 neverlandly 阅读(642) 评论(0) 推荐(0)

Leetcode: Count Numbers with Unique Digits

摘要： Analysis: A number of unique digits is a number which is a combination of unrepeated digits. So, we can calculate the total number. for number with n 阅读全文

posted @ 2016-11-26 04:20 neverlandly 阅读(337) 评论(0) 推荐(0)

Leetcode: Design Twitter

摘要：注意需要maintain一个time stamp, 每次postTweet时++。还有要注意unfollow的时候，不能unfollow自己关于PriorityQueue还看到这一种写法，挺简单的： 1 Set<Integer> users = userMap.get(userId).follow 阅读全文

posted @ 2016-11-26 01:58 neverlandly 阅读(432) 评论(0) 推荐(0)