07 2017 档案

[LeetCode] 638. Shopping Offers 购物优惠

摘要：In LeetCode Store, there are n items to sell. Each item has a price. However, there are some special offers, and a special offer consists of one or mo 阅读全文

posted @ 2017-07-31 10:05 Grandyang 阅读(7700) 评论(2) 推荐(0) 编辑

[LeetCode] Average of Levels in Binary Tree 二叉树的层平均值

摘要：Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array. Example 1: Input: 3 / \ 9 20 / \ 15 7 Outp 阅读全文

posted @ 2017-07-30 15:08 Grandyang 阅读(5361) 评论(0) 推荐(0) 编辑

[LeetCode] Exclusive Time of Functions 函数的独家时间

摘要：Given the running logs of n functions that are executed in a nonpreemptive single threaded CPU, find the exclusive time of these functions. Each funct 阅读全文

posted @ 2017-07-27 14:42 Grandyang 阅读(9036) 评论(5) 推荐(0) 编辑

[LeetCode] Design Log Storage System 设计日志存储系统

摘要：You are given several logs that each log contains a unique id and timestamp. Timestamp is a string that has the following format: Year:Month:Day:Hour: 阅读全文

posted @ 2017-07-23 14:01 Grandyang 阅读(11435) 评论(0) 推荐(0) 编辑

[LeetCode] Find the Derangement of An Array 找数组的错排

摘要：In combinatorial mathematics, a derangement is a permutation of the elements of a set, such that no element appears in its original position. There's 阅读全文

posted @ 2017-07-20 14:05 Grandyang 阅读(4489) 评论(0) 推荐(0) 编辑

[LeetCode] 632. Smallest Range Covering Elements from K Lists 覆盖K个列表元素的最小区间

摘要：You have k lists of sorted integers in ascending order. Find the smallest range that includes at least one number from each of the k lists. We define 阅读全文

posted @ 2017-07-18 13:26 Grandyang 阅读(9422) 评论(4) 推荐(2) 编辑

[LeetCode] 633. Sum of Square Numbers 平方数之和

摘要：Given a non-negative integer c, your task is to decide whether there're two integers a and b such that a2 + b2 = c. Example 1: Example 2: 这道题让我们求一个数是否阅读全文

posted @ 2017-07-16 14:43 Grandyang 阅读(7927) 评论(3) 推荐(2) 编辑

[LeetCode] 631. Design Excel Sum Formula 设计Excel表格求和公式

摘要：Your task is to design the basic function of Excel and implement the function of sum formula. Specifically, you need to implement the following functi 阅读全文

posted @ 2017-07-14 14:42 Grandyang 阅读(5858) 评论(7) 推荐(0) 编辑

[LeetCode] 583. Delete Operation for Two Strings 两个字符串的删除操作

摘要：Given two words word1 and word2, find the minimum number of steps required to make word1 and word2 the same, where in each step you can delete one cha 阅读全文

posted @ 2017-07-10 06:53 Grandyang 阅读(8777) 评论(2) 推荐(1) 编辑

[LeetCode] Kill Process 结束进程

摘要：Given n processes, each process has a unique PID (process id) and its PPID (parent process id). Each process only has one parent process, but may have 阅读全文

posted @ 2017-07-10 06:48 Grandyang 阅读(8630) 评论(0) 推荐(1) 编辑

[LeetCode] Course Schedule III 课程清单之三

摘要：There are n different online courses numbered from 1 to n. Each course has some duration(course length) tand closed on dth day. A course should be tak 阅读全文

posted @ 2017-07-06 14:44 Grandyang 阅读(8002) 评论(3) 推荐(2) 编辑

[LeetCode] K Inverse Pairs Array K个翻转对数组

摘要：Given two integers n and k, find how many different arrays consist of numbers from 1 to n such that there are exactly k inverse pairs. We define an in 阅读全文

posted @ 2017-07-03 15:33 Grandyang 阅读(6463) 评论(2) 推荐(1) 编辑