QA Official

3 Red Alert

https://qaofficial.com/post/2019/04/13/69991-3-red-alert.html 2019-04-13
It is very important to maintain connectivity between cities in the war.This topic requires you to write an alarm program that will give a red alarm when the loss of a city causes the country to be divided into several disconnected areas.Note: If the country is not completely connected and is divided into K regions, and the loss of one city does not change the connectivity between other cities, do not issue an alarm.

5-9 Red Alert (25 points)

https://qaofficial.com/post/2019/04/13/69970-5-9-red-alert-25-points.html 2019-04-13
5-9 Red Alert (25 points)It is very important to maintain connectivity between cities in the war.This topic requires you to write an alarm program that will give a red alarm when the loss of a city causes the country to be divided into several disconnected areas.Note: If the country is not completely connected and is divided into K regions, and the loss of one city does not change the connectivity

7-6 Red Alert (25 points) (Union Find)

https://qaofficial.com/post/2019/04/13/69978-7-6-red-alert-25-points-union-find.html 2019-04-13
topic linkIt is very important to maintain connectivity between cities in the war.This topic requires you to write an alarm program that will give a red alarm when the loss of a city causes the country to be divided into several disconnected areas.Note: If the country is not completely connected and is divided into K regions, and the loss of one city does not change the connectivity between other cities,

7-9 Red Alert (25 points)

https://qaofficial.com/post/2019/04/13/69995-7-9-red-alert-25-points.html 2019-04-13
7-9 Red Alert (25 points) //并查集 不好理解啊 #include<iostream> #include<stdio.h> #include<string.h> using namespace std; struct p{ int x;//代表路线的一端,“x”城市 int y;//代表路线的另一端,“y”城市 }eg[5001];

Atitit.web video player classid clsid summarizes the usefulness of QuickTime, vlc1.classid.Used to specify player 12. tags are used to contain objects such as images, sounds

https://qaofficial.com/post/2019/04/13/70033-atitit.web-video-player-classid-clsid-summarizes-the-usefulness-of-quicktime-vlc1.classid.used-to-specify-player-12.-tags-are-used-to-contain-objects-such-as-images-sounds.html 2019-04-13
Web video player classid clsid big summary quicktime,vlc  1. Usefulness of classid.Used to specify player 1 2. <object> > tags are used to contain objects such as images, audio, video, Java applets, ActiveX, PDF , and Flash.one 3. <p>----readone 2 4.--latest version of wmp (wmp12 supported) 2 5. --pps (not available) 3 6. --qktm 3 7. --vlc 3  1. Usefulness of classid.

Java Five Operators

https://qaofficial.com/post/2019/04/13/70053-java-five-operators.html 2019-04-13
Five Operators arithmetic operator +;-;*;/;Alfred Hitchcock Presents" The PercentageWhen doing division, one should pay attention to the pithy formula (if one thinks blindly, one should not spray it if one does not like it)The quotient of integer division (/)The remainder (%) is obtained by dividing the whole number.The division of integers is only integer.Decimals to be obtained

L2-013 Red Alert (25 points)

https://qaofficial.com/post/2019/04/13/69999-l2-013-red-alert-25-points.html 2019-04-13
L2-013 Red Alert (25 points) It is very important to maintain connectivity between cities in the war.This topic requires you to write an alarm program that will give a red alarm when the loss of a city causes the country to be divided into several disconnected areas.Note: If the country is not completely connected and is divided into K regions, and the loss of one city does not change the

L2-013 Red Alert (DFS or Union Find for Connection Diagram)

https://qaofficial.com/post/2019/04/13/70008-l2-013-red-alert-dfs-or-union-find-for-connection-diagram.html 2019-04-13
topic link: https://pintia.cn/problems-sets/994805063807840/problems/994805063963230208 DFS for Connected Graph !!!Note that the exist array must be opened to record the Destroyed City. Destroyed arrays are different from accessing arrays!!!The idea is to carry out DFS on each node. If it exists in the connection graph formed by DFS of the previous node or is not destroyed, DFS will not be carried out, thus calculating the number

L2-013 Red Alert Union Find

https://qaofficial.com/post/2019/04/13/69987-l2-013-red-alert-union-find.html 2019-04-13
topic connection Question Solution: The problem of connected blocks obviously has to do with Union Find, and C4 games like to give out knowledge related to Union Find. This problem can be done in such a way that every time I remove a city, I reestablish Union Find for the remaining cities, and then judge whether the number of connected blocks has been deleted. If the number of connected blocks has not changed, it means that connectivity has not been destroyed, while if the change indicates that connectivity has been destroyed, it is very violent and time complexity is high, but it can still be passed.

L2-013. Red Alarm (Union Find ~)

https://qaofficial.com/post/2019/04/13/70002-l2-013.-red-alarm-union-find-~.html 2019-04-13
L2-013. Red Alert Time Limit400 msMemory limit65536 kBCode length limit8000 BTopic judging procedureStandardAuthorChen YueIt is very important to maintain connectivity between cities in the war.This topic requires you to write an alarm program that will give a red alarm when the loss of a city causes the country to be divided into several disconnected areas.Note: If the country is not completely connected and is divided into K regions, and the loss of one city does not change the connectivity between other cities, do not issue an alarm.