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mongodb启动错误(Failed to set up listener: SocketException: Cannot assign requested address)
错误原因: 集群服务器修改过一次IP,但是对应的/etc/hosts文件没有修改 错误日志 cat /var/log/mongdb/mongd.log 2019-01-16T09:50:44.675+0800 E STORAGE [initandlisten] Failed to set up li ...
分类:数据库   时间:2020-02-13 12:41:57    阅读次数:235
EMC NW NMM to restore MS AG database
Following last article, how to restore MS AG database , that is in the following: You see ? Cheer up , we will begin our trip now. From EMC NW console ...
分类:数据库   时间:2020-02-12 23:59:22    阅读次数:141
[LC] 299. Bulls and Cows
Example 1: Input: secret = "1807", guess = "7810" Output: "1A3B" Explanation: 1 bull and 3 cows. The bull is 8, the cows are 0, 1 and 7. Example 2: In ...
分类:其他好文   时间:2020-02-12 22:25:22    阅读次数:81
[Usaco2017 Open]Bovine Genomics
Farmer John owns Ncows with spots and N cows without spots. Having just completed a course in bovine genetics, he is convinced that the spots on his c ...
分类:其他好文   时间:2020-02-12 18:15:58    阅读次数:70
lost cows
这道题用树状数组做比较好,虽然树状数组能做的线段树也可以做到,但是树状数组更简洁方便,易操作 原理便是第x个数的二进制数最后一个“1”,决定tree的结点的长度 比如: sum[3]=tree[3]+tree[2]; sum[4]=tree[4]; sum[5]=tree[5]+tree[4]; 分 ...
分类:其他好文   时间:2020-02-12 13:15:00    阅读次数:42
jmeter性能测试2:基础功能介绍
对于英语不好的同学建议先改为简体中文再进行使用 1、添加->threads->线程组(控制总体并发) 线程数:虚拟用户数。一个虚拟用户占用一个进程或线程 准备时长(Ramp-Up Period(in seconds)):全部线程启动的时长,比如100个线程,20秒,则表示20秒内100个线程都要启动 ...
分类:其他好文   时间:2020-02-12 12:34:23    阅读次数:74
A Simple Problem with Integers
这是一道简单应用线段树的题 代码也是书上的,敲一边熟悉一下 #include <iostream>#include <cstdio>using namespace std;const int MAX=1e5+10;long long sum[MAX<<2],add[MAX<<2]; void up_ ...
分类:其他好文   时间:2020-02-11 19:07:08    阅读次数:53
POJ3662 Telephone Lines (dijkstra+二分)
Farmer John wants to set up a telephone line at his farm. Unfortunately, the phone company is uncooperative, so he needs to pay for some of the cables ...
分类:其他好文   时间:2020-02-11 09:45:17    阅读次数:72
OpenCV--图像金字塔
图像金字塔 高斯金字塔 高斯金字塔:向下采样方法(缩小) 高斯金字塔:向上采样方法(放大) img=cv2.imread("AM.png") cv_show(img,'img') print (img.shape) 效果: up=cv2.pyrUp(img) cv_show(up,'up') pri ...
分类:其他好文   时间:2020-02-10 18:14:56    阅读次数:69
CF1096E The Top Scorer 组合数 容斥
枚举小明得到得分数为x,枚举得分为x得有i人 主要问题是求出g(s,n,up) 有多少种方案满足: s个求,n个箱子,每个箱子容量为up #include<bits/stdc++.h> using namespace std; typedef long long ll; const int N=1e ...
分类:其他好文   时间:2020-02-10 13:39:03    阅读次数:43
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