一.技术总结 这一题是考查图的知识,题目的意思要理解清楚,就是考查统计图中连通块的数量,也就是没有一个结点后. 怎么删除该结点,并且统计连通块的数量成为问题解决的关键,这里可以当访问到结点时,直接返回,或则跳过,这种操作就是相当于删除了该结点. memset(inq, false, sizeof(inq));这个是初始化标记数组,可以用于反复的遍历数组. 还有这次出现了一个比较简单的问题,就是在写for循环的嵌套时,同时使用了i变量,导致答案错误,这种问题一下又检查不出来,细心点. 二.参考代码…

1013 Battle Over Cities (25 分)   It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any o…

1013 Battle Over Cities (25分)   It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any ot…

It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of…

It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of…

题目 It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest…

题意: 输入三个整数N,M,K(N<=1000,第四个数据1e5<=M<=1e6).有1~N个城市,M条高速公路,K次询问,每次询问输入一个被敌军占领的城市,所有和该城市相连的高速公路全部不能使用,求增加多少条高速公路可以使剩下N-1个城市联通.(原本城市之间可能不联通,假设原本联通只能通过第0,4个数据). trick: 同一份代码交很多次,有几次会第4个点超时.(存疑)建议采用g++而不是clang++ AAAAAccepted code: #include<bits/stdc…

1013. Battle Over Cities (25) t is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other…

1013. Battle Over Cities (25) 时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that cit…

It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of…