E - Restore 题意:输入一个n,输入一个对角线空缺(为0)的n*n的矩阵,要求每一行每一列和对角线的和相同,输出完整的矩阵. 解法:设每一行的和都是sum,用一个h[]数组存每一行的和.则可得a[0][0] = sum-h[0], a[1][1] = sum-h[1], a[2][2] = sum-h[2]......同时所有对角线的和也为sum,则可得公式 sum-h[0]+sum-h[1]+...+sum-h[n-1] = sum, 设所有h[x]的和为summ, 即n*sum-s…

A.B.C(By musashiheart) 0216个人赛前三道题解 E(By ggg) Gym - 100735E Restore H(by pipixia) Gym - 100735H…

Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example:Given "25525511135", return ["255.255.11.135", "255.255.111.35"]. (Order does not matter) 这道题要求是复原IP地址,IP地…

网上搜罗了一堆资料,最后总结一下. save:用来保存Canvas的状态.save之后,可以调用Canvas的平移.放缩.旋转.错切.裁剪等操作. restore:用来恢复Canvas之前保存的状态.防止save后对Canvas执行的操作对后续的绘制有影响. 对canvas中特定元素的旋转平移等操作实际上是对整个画布进行了操作,所以如果不对canvas进行save以及restore,那么每一次绘图都会在上一次的基础上进行操作,最后导致错位.比如说你相对于起始点每次30度递增旋转,30,60,90…

When we setup source control server, we should always make a backup and restore plan for it. This article is to describe how to backup and restore a TFS Express instance from one server to another server. This blog is an English version, for Chinese…

 Gym 101047M Removing coins in Kem Kadrãn Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Practice Description standard input/output Andréh and his friend Andréas are board-game aficionados. They know many of their friend…

 Gym 101047K Training with Phuket's larvae Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Practice Description standard input/output Thai cuisine is known for combining seasonings so that every dish has flavors that are…

Gym 101047E Escape from Ayutthaya Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u  Practice  Description standard input/output Ayutthaya was one of the first kingdoms in Thailand, spanning since its foundation in 1350 to…

 Gym 101047B  Renzo and the palindromic decoration Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Practice Description standard input/output At the ruins of Wat Phra Si Sanphet (วดพระศรสรรเพชญ), one can find famous inscr…

前面我们 backup 了 voluem,今天我们将讨论如何 restore volume. restore 的过程其实很简单,两步走: 在存储节点上创建一个空白 volume. 将 backup 的数据 copy 到空白 voluem 上. 下面我们来看 restore 操作的详细流程: 向 cinder-api 发送 backup 请求 cinder-api 发送消息 cinder-scheduler 挑选最合适的 cinder-volume cinder-volume 创建空白 volum…