First 父:"要多想." 子:"想了之后呢?" 父:"北海,我只能告诉你在那以前要多想." 要多想--这场战争敌我力量对比过于悬殊,硬碰硬必然是当年左倾冒险主义的结局,一定会失败.要多想,不要头脑发热,不要以为有可能打赢,一定要想清楚. 想了之后呢--我想过了,确实不可能赢.但又能怎样呢?我想了,也明白不能重复左倾冒进的老路,但想了之后要怎么办? 北海,我只能告诉你在那以前要多想--我只能提醒你要多想.既然你已经想明白左倾冒险不可能赢了,就只…
又是个2-sat的模板题: 反正评委的选择必须有一个是正确的,1错误,那么2就必须正确: 这就是一个2-sat问题. 直接上白书的模板啊,不过稍微要注意的一点是对于第一个点必须要选择,不然就违反了题意: 代码: #include<cstdio> #define maxn 2005 #define maxm 4005 #include<vector> #include<cstring> using namespace std; struct twosat { int n;…
想要输出""的话: cout<<"A person whose name is \""<<name<<"\" and age is "<<age<<" is created!"<<endl; Home Web Board ProblemSet Standing Status Statistics   Problem G: 克隆人来了!…
Home Web Board ProblemSet Standing Status Statistics   Problem F: 求平均年龄 Problem F: 求平均年龄 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 720  Solved: 394[Submit][Status][Web Board] Description 定义一个Persons类,用于保存若干个人的姓名(string类型)和年龄(int类型),定义其方法 void ad…
I am not good, but I shall do my best to be better. Any questions, please feel free to contact zhangzujin361@163.com. [1]    Jian Pan, Zujin Zhang, Xiangying Zhou, Optimal dynamic mean-variance asset-liability management under the Heston model, Advan…
文章内容均来自斯坦福大学的Andrew Ng教授讲解的Machine Learning课程,本文是针对该课程的个人学习笔记,如有疏漏,请以原课程所讲述内容为准.感谢博主Rachel Zhang 的个人笔记,为我做个人学习笔记提供了很好的参考和榜样. § 4.正则化与过拟合问题 Regularization/The Problem of Overfitting 1 过拟合问题 The problem of overfitting 首先,Andrew Ng还是对之前几节中提到过的房屋面积-房价问题进…
Who's Aunt Zhang Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 19    Accepted Submission(s): 16 Problem Description Aunt Zhang, well known as 张阿姨, is a fan of Rubik’s cube. One day she buys a…
Who's Aunt Zhang Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 125    Accepted Submission(s): 108 Problem Description Aunt Zhang, well known as 张阿姨, is a fan of Rubik’s cube. One day she buys…
求有限集传递闭包的 Floyd Warshall 算法(矩阵实现) 其实就三重循环.zzuoj 1199 题 链接 http://acm.zzu.edu.cn:8000/problem.php?id=1199 Problem B: 大小关系 Time Limit: 2 Sec  Memory Limit: 128 MBSubmit: 148  Solved: 31[Submit][Status][Web Board] Description 当我们知道一组大小关系之后,可判断所有关系是否都能成立…
Gson解析JSON字符串时出现了下面的错误: No-args constructor for class X does not exist. Register an InstanceCreator with Gson for this type to fix this problem. 解决的办法是把对应的Class改成静态类.…