Blow up the city 时间限制: 1 Sec 内存限制: 128 MB 题目描述 Country A and B are at war. Country A needs to organize transport teams to deliver supplies toward some command center cities. In order to ensure the delivery works efficiently, all the roads in country…
Country A and B are at war. Country A needs to organize transport teams to deliver supplies toward some command center cities. In order to ensure the delivery works efficiently, all the roads in country A work only one direction. Therefore, map of co…
题意:给定一个n点m边的DAG,将只有入边的点称为周驿东点 q次询问,每次给定a,b两点,询问删去某个点x和其相连的所有边,能使a,b至少其中之一不能到达任何周驿东点的x的个数 n,q<=1e5,m<=2e5 思路: #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef unsigned int uint; typedef unsigned long long ull; typedef…
B.Blow up the city solved by F0_0H 210min 题意 给一个DAG,每次询问给定u,v,求使得u或v不能与中心点联通的关键点个数 做法 按照拓扑序建树 新加节点的父亲为该节点前驱的lca 查询答案,只需输出u,v两点深度,减去lca深度 G. Find the answer solved by rdc 50min -2 题意:查询区间内至多几个数字之和小于等于 m. 做法:权值线段树.…
原文 Some fresh air After your time underground,you can return to ground level or maybe even a little higher at Kosciuszko Mound. The 34-meter hill is a memorial for a Polish military hero but also offers a panoramic view of surrounding city from top.…
原文 History lives on in this distinguished Polish city Though it may be ancient. KraKow, Poland, is alive and well as it celebrates and commemorates its meaningful history. Looking up When scaning the skies of Krakow,most agree that Wawel Castle cast…
时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 Little Hi gets lost in the city. He does not know where he is. He does not know which direction is north. Fortunately, Little Hi has a map of the city. The map can be considered as a grid of N*M blocks. Each blo…
Here is a brief outline of the steps needed to install GeoIP Legacy City on Linux/Unix. The installation on Windows is similar, just replace the tar command with WinZip or a similar ZIP program. Step 1 – Download database For GeoIP clients, go to the…
