题目 Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping of digit to ...
分类:
其他好文 时间:
2018-07-31 15:30:34
阅读次数:
153
CodeForces 1006D You are given two strings a and b consisting of lowercase English letters, both of length n. The characters of both strings have indi ...
分类:
其他好文 时间:
2018-07-30 11:23:19
阅读次数:
159
https://mp.weixin.qq.com/s?__biz=MzI4Njc5NjM1NQ==&mid=2247485618&idx=1&sn=ed892f572b81e6aa6a7be5c43c2e7351&chksm=ebd6379edca1be88f7d3703db31115ced7c5c ...
分类:
数据库 时间:
2018-07-29 21:19:32
阅读次数:
298
表头包含有: id select_type table type possible_keys key key_len ref rows Extra id:select 查询的序列号,包含一组数字,表示查询中执行select子句或操作表的顺序,分为三种情况: 三种情况: 1.id相同,执行顺序由上至下 ...
分类:
数据库 时间:
2018-07-29 17:59:42
阅读次数:
206
题目描述: We have a two dimensional matrix A where each value is 0 or 1. A move consists of choosing any row or column, and toggling each value in that ro ...
分类:
其他好文 时间:
2018-07-29 12:56:22
阅读次数:
161
John has n tasks to do. Unfortunately, the tasks are not independent and the execution of one task is only possible if other tasks have already been e ...
分类:
编程语言 时间:
2018-07-28 23:28:40
阅读次数:
224
everything is possible nothing is impossible 摘要:输入输出、条件与循环,文件操作,异常,模块与包,python特性、linux基础与git 1基础语法: 1:输入与输出: 1,修改不可变数据会抛出TypeError错误 2,print默认调用了sys.s ...
分类:
编程语言 时间:
2018-07-28 11:47:57
阅读次数:
234
http://acm.hdu.edu.cn/showproblem.php?pid=2058 Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub-seque ...
分类:
其他好文 时间:
2018-07-28 00:13:19
阅读次数:
119
题目传送门 POJ 1458 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < ...
分类:
其他好文 时间:
2018-07-25 01:12:22
阅读次数:
178
folly/Function.h folly::Function is a polymorphic function wrapper that is not copyable and does not require the wrapped function to be copy construct ...
分类:
其他好文 时间:
2018-07-24 12:24:51
阅读次数:
147