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2017年6月28日
LeetCode 405. Convert a Number to Hexadecimal （把一个数转化为16进制）
摘要： Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s complement method is used. Note: 题目标签：Bit Manipulation 阅读全文
posted @ 2017-06-28 23:46 Jimmy_Cheng 阅读(321) 评论(0) 推荐(0) 编辑
LeetCode 594. Longest Harmonious Subsequence （最长的协调子序列）
摘要： We define a harmonious array is an array where the difference between its maximum value and its minimum value is exactly 1. Now, given an integer arra 阅读全文
posted @ 2017-06-28 04:03 Jimmy_Cheng 阅读(396) 评论(0) 推荐(0) 编辑
LeetCode 371. Sum of Two Integers （两数之和）
摘要： Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example:Given a = 1 and b = 2, return 3. 题目标签：Bit Mani 阅读全文
posted @ 2017-06-28 02:38 Jimmy_Cheng 阅读(802) 评论(0) 推荐(0) 编辑
2017年6月26日
LeetCode 342. Power of Four （4的次方）
摘要： Given an integer (signed 32 bits), write a function to check whether it is a power of 4. Example:Given num = 16, return true. Given num = 5, return fa 阅读全文
posted @ 2017-06-26 23:35 Jimmy_Cheng 阅读(334) 评论(0) 推荐(0) 编辑
LeetCode 191. Number of 1 bits （位1的数量）
摘要： Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example, the 32-bit 阅读全文
posted @ 2017-06-26 22:49 Jimmy_Cheng 阅读(211) 评论(0) 推荐(0) 编辑
LeetCode 190. Reverse Bits （反转位）
摘要： Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), retur 阅读全文
posted @ 2017-06-26 07:40 Jimmy_Cheng 阅读(350) 评论(0) 推荐(0) 编辑
2017年6月25日
LeetCode 252. Meeting Rooms （会议室）$
摘要： Given an array of meeting time intervals consisting of start and end times [[s1,e1],[s2,e2],...] (si < ei), determine if a person could attend all mee 阅读全文
posted @ 2017-06-25 04:47 Jimmy_Cheng 阅读(863) 评论(0) 推荐(0) 编辑
LeetCode 455. Assign Cookies （分发曲奇饼干）
摘要： Assume you are an awesome parent and want to give your children some cookies. But, you should give each child at most one cookie. Each child i has a g 阅读全文
posted @ 2017-06-25 02:14 Jimmy_Cheng 阅读(1043) 评论(0) 推荐(0) 编辑
2017年6月24日
LeetCode 598. Range Addition II （范围加法之二）
摘要： Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is repres 阅读全文
posted @ 2017-06-24 08:51 Jimmy_Cheng 阅读(703) 评论(0) 推荐(0) 编辑
2017年6月23日
LeetCode 599. Minimum Index Sum of Two Lists （从两个lists里找到相同的并且位置总和最靠前的）
摘要： Suppose Andy and Doris want to choose a restaurant for dinner, and they both have a list of favorite restaurants represented by strings. You need to h 阅读全文
posted @ 2017-06-23 21:45 Jimmy_Cheng 阅读(411) 评论(0) 推荐(0) 编辑
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