Veritas_des_Liberty

2018年11月15日

摘要： Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already presen 阅读全文

posted @ 2018-11-15 21:44 Veritas_des_Liberty 阅读(245) 评论(0) 推荐(0)

355. Design Twitter

摘要： Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the u 阅读全文

posted @ 2018-11-15 21:03 Veritas_des_Liberty 阅读(196) 评论(0) 推荐(0)

347. Top K Frequent Elements (sort map)

摘要： Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input 阅读全文

posted @ 2018-11-15 15:13 Veritas_des_Liberty 阅读(256) 评论(0) 推荐(0)

217. Contains Duplicate

摘要： Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr 阅读全文

posted @ 2018-11-15 14:37 Veritas_des_Liberty 阅读(252) 评论(0) 推荐(0)

2018年11月14日

219. Contains Duplicate II

摘要： Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the 阅读全文

posted @ 2018-11-14 22:39 Veritas_des_Liberty 阅读(224) 评论(0) 推荐(0)

136. Single Number

摘要： Given a non-empty array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runti 阅读全文

posted @ 2018-11-14 21:56 Veritas_des_Liberty 阅读(256) 评论(0) 推荐(0)

138. Copy List with Random Pointer (not do it by myself)

摘要： A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null. Return a deep copy 阅读全文

posted @ 2018-11-14 21:23 Veritas_des_Liberty 阅读(260) 评论(0) 推荐(0)

202. Happy Number

摘要： Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive intege 阅读全文

posted @ 2018-11-14 19:53 Veritas_des_Liberty 阅读(296) 评论(0) 推荐(0)

290. Word Pattern

摘要： Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a lette 阅读全文

posted @ 2018-11-14 16:39 Veritas_des_Liberty 阅读(205) 评论(0) 推荐(0)

2018年11月13日

149. Max Points on a Line

摘要： Given n points on a 2D plane, find the maximum number of points that lie on the same straight line. Example 1: Example 2: my code: can't determine the 阅读全文

posted @ 2018-11-13 22:31 Veritas_des_Liberty 阅读(192) 评论(0) 推荐(0)

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