hyx1 - 博客园

2020年2月13日

摘要： Given a linked list, remove the n-th node from the end of list and return its head. Example: Given linked list: 1->2->3->4->5, and n = 2. After removi 阅读全文

posted @ 2020-02-13 19:35 hyx1 阅读(113) 评论(0) 推荐(0) 编辑

17. Letter Combinations of a Phone Number

摘要： Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to le 阅读全文

posted @ 2020-02-13 19:12 hyx1 阅读(123) 评论(0) 推荐(0) 编辑

2020年2月12日

矩阵中的路径

摘要：题目描述请设计一个函数，用来判断在一个矩阵中是否存在一条包含某字符串所有字符的路径。路径可以从矩阵中的任意一个格子开始，每一步可以在矩阵中向左，向右，向上，向下移动一个格子。如果一条路径经过了矩阵中的某一个格子，则该路径不能再进入该格子。例如 \begin{bmatrix} a & b & c 阅读全文

posted @ 2020-02-12 21:19 hyx1 阅读(78) 评论(0) 推荐(0) 编辑

旋转数组的最小数字

摘要：题目描述把一个数组最开始的若干个元素搬到数组的末尾，我们称之为数组的旋转。输入一个非递减排序的数组的一个旋转，输出旋转数组的最小元素。例如数组{3,4,5,1,2}为{1,2,3,4,5}的一个旋转，该数组的最小值为1。NOTE：给出的所有元素都大于0，若数组大小为0，请返回0。 1 import 阅读全文

posted @ 2020-02-12 16:18 hyx1 阅读(71) 评论(0) 推荐(0) 编辑

182. Duplicate Emails

摘要： Write a SQL query to find all duplicate emails in a table named Person. + + + | Id | Email | + + + | 1 | a@b.com | | 2 | c@d.com | | 3 | a@b.com | + + 阅读全文

posted @ 2020-02-12 15:16 hyx1 阅读(90) 评论(0) 推荐(0) 编辑

180. Consecutive Numbers

摘要： Write a SQL query to find all numbers that appear at least three times consecutively. + + + | Id | Num | + + + | 1 | 1 | | 2 | 1 | | 3 | 1 | | 4 | 2 | 阅读全文

posted @ 2020-02-12 14:59 hyx1 阅读(127) 评论(0) 推荐(0) 编辑

181. Employees Earning More Than Their Managers

摘要： The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id. + + + + + | 阅读全文

posted @ 2020-02-12 14:56 hyx1 阅读(121) 评论(0) 推荐(0) 编辑

15. 3Sum

摘要： Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the s 阅读全文

posted @ 2020-02-12 12:41 hyx1 阅读(100) 评论(0) 推荐(0) 编辑

11. Container With Most Water

摘要： Given n non-negative integers a1, a2, ..., an , where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endp 阅读全文

posted @ 2020-02-12 10:36 hyx1 阅读(99) 评论(0) 推荐(0) 编辑

2020年2月11日

178. Rank Scores

摘要： Write a SQL query to rank scores. If there is a tie between two scores, both should have the same ranking. Note that after a tie, the next ranking num 阅读全文

posted @ 2020-02-11 19:05 hyx1 阅读(105) 评论(0) 推荐(0) 编辑

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