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Scramble String
Description Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible ...
分类:其他好文   时间:2019-12-21 22:56:17    阅读次数:82
Combination Sum IV
Description Given an integer array nums with all positive numbers and no duplicates, find the number of possible combinations that add up to a positiv ...
分类:其他好文   时间:2019-12-21 22:30:21    阅读次数:119
超时机制
mysql连接的超时问题:Communications link failure org.springframework.dao.RecoverableDataAccessException: ### Error updating database. Cause: com.mysql.jdbc.ex ...
分类:其他好文   时间:2019-12-20 15:22:04    阅读次数:144
Codeforces Round #603 (Div. 2) B. PIN Codes
链接: https://codeforces.com/contest/1263/problem/B 题意: A PIN code is a string that consists of exactly 4 digits. Examples of possible PIN codes: 7013, ...
分类:其他好文   时间:2019-12-17 13:32:20    阅读次数:168
[LC] 62. Unique Paths
A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any p ...
分类:其他好文   时间:2019-12-16 09:18:17    阅读次数:102
dp--01背包--Charm Bracelet
Charm Bracelet Bessie has gone to the mall's jewelry store and spies a charm bracelet. Of course, she'd like to fill it with the best charms possible ...
分类:其他好文   时间:2019-12-14 16:07:40    阅读次数:98
LeetCode试炼之路(4):墙与门(286)
题目的英文版是这样的: You are given a m x n 2D grid initialized with these three possible values. 1 A wall or an obstacle. 0 A gate. INF Infinity means an empty ...
分类:其他好文   时间:2019-12-12 18:21:18    阅读次数:80
【leetcode】1284. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix
题目如下: Given a m x n binary matrix mat. In one step, you can choose one cell and flip it and all the four neighbours of it if they exist (Flip is chang ...
分类:其他好文   时间:2019-12-11 23:37:50    阅读次数:142
spring boot JPA 和 数据库连接
当JPA获取数据库数据连接时,如果连接数超过最大连接数的配置,系统就会报错: 和: 连接数的配置: 如果不配置的话,默认都是10. 我们使用entitymanager进行查询和其他操作时,调用这个方法org.springframework.orm.jpa.SharedEntityManagerCre ...
分类:数据库   时间:2019-12-11 21:10:38    阅读次数:123
Math 309 Extra-Credit
Math 309 Extra-Credit Project 4 Fall, 2019The amount of extra-credit will depend on the overall quality of your work. Youmust submit a formal Report t ...
分类:其他好文   时间:2019-12-11 13:09:11    阅读次数:100
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