前言 好久没有打 AtCoder 了.有点手生.只拿到了 \(\operatorname{rk}1510\),应该上不了多少分. 只切了 \(\texttt{A,B,C,D}\) 四题. A - Generalized ABC 简要题意 给出一个整数 \(K\),输出前 \(K\) 个大写英文字母. \(1 \leq K \leq 26\) 思路 模拟. 时间复杂度 \(O(K)\),难度 入门. 代码 #include <bits/stdc++.h> #define int long lon…

Problem DescriptionMost of us know that in the game called DotA(Defense of the Ancient), Pudge is a strong hero in the first period of the game. When the game goes to end however, Pudge is not a strong hero any more.So Pudge’s teammates give him a ne…

Bots are everywhere nowadays, and we interact with them all of the time. From interactions on our phones, in chat rooms, in GitHub discussions, and Slack channels, these guys are everywhere and don't seem to be going anywhere any time soon. After let…

Eat the Trees Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5079    Accepted Submission(s): 2628 Problem Description Most of us know that in the game called DotA(Defense of the Ancient), Pudge…

Problem Description Most of us know that in the game called DotA(Defense of the Ancient), Pudge is a strong hero in the first period of the game. When the game goes to end however, Pudge is not a strong hero any more.So Pudge’s teammates give him a n…

题目链接:https://vjudge.net/problem/HDU-1693 Eat the Trees Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4505    Accepted Submission(s): 2290 Problem Description Most of us know that in the game c…

<select id="getCount" resultType="int"> select count(1) from <choose> <when test='type!=null and type=="2"'> (或者<when test="type!=null and type=='2'.toString()">) t_evaluate_training t,t_trai…

choose标签是按顺序判断其内部when标签中的test条件是否成立,如果有一个成立,则 choose 结束. 当 choose 中所有 when 的条件都不满则时,则执行 otherwise 中的sql. 类似于Java 的 switch 语句,choose 为 switch,when 为 case,otherwise 则为 default. 例如下面例子,同样把所有可以限制的条件都写上,方面使用. choose会从上到下选择一个when标签的test为true的sql执行.安全考虑,我们使…

本系列文章会深入研究 Ceph 以及 Ceph 和 OpenStack 的集成: (1)安装和部署 (2)Ceph RBD 接口和工具 (3)Ceph 物理和逻辑结构 (4)Ceph 的基础数据结构 (5)Ceph 与 OpenStack 集成的实现 (6)QEMU-KVM 和 Ceph RBD 的 缓存机制总结 (7)Ceph 的基本操作和常见故障排除方法 (8)基本的性能测试工具和方法 (9) pool 的size 和 min_size,choose 和 chooseleaf,pg scru…

UVA - 10375 Choose and divide Choose and divide Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 4053   Accepted: 1318 Description The binomial coefficient C(m,n) is defined as m! C(m,n) = -------- n!(m-n)! Given four natural numbers p, q…