题目链接 题意: 有n座塔,每座塔的攻击范围为[l,r],攻击力为d,有k个怪兽从这些塔前面经过,第i只怪兽初始的生命力为hp,出现的位置为x,终点为第n个格子.问最后有多少只怪兽还活着. 分析: 这个题刚开始是想用线段树,但是这个题会超时,线段树是O(nlogn)的复杂度,应该是卡的输入输出, 所以看别人的博客有人用 快速读入的方法用线段树 险过了,就是把每一个当作字符来输入,然后处理成数字. 但是正解是O(n)的处理,即把l, r,  d, 用数组a[l] += d;  a[r+1] = -…

pid=4970">Killing Monsters                                                                        Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Problem Description Kingdom Rush is a popular TD game, in which…

Killing Monsters Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2838    Accepted Submission(s): 1068 Problem Description Kingdom Rush is a popular TD game, in which you should build some towe…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4970 Problem Description Kingdom Rush is a popular TD game, in which you should build some towers to protect your kingdom from monsters. And now another wave of monsters is coming and you need again to k…

开始以为是线段树,算了一下复杂度也觉得能过...但是这题貌似卡了线段树... 具体做法: 对每一个塔,记录attack[l]+=d,attack[r+1]-=d;这样对于每个block,受到的伤害就是前缀和attack[1]+attack[2]+...+attack[i]; 从后往前遍历,计算从当前点到结束受到的总的伤害: ps:貌似很多人都是用树状数组写的...写完还是不太懂和树状数组有什么关系...orz #include <iostream> #include <cstring&g…

2014多校9 1011 http://acm.hdu.edu.cn/showproblem.php?pid=4970 Killing Monsters Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 331    Accepted Submission(s): 198 Problem Description Kingdom Rush…

题目地址:HDU 4970 先进行预处理.在每一个炮塔的火力范围边界标记一个点. 然后对每一个点的伤害值扫一遍就能算出来. 然后在算出每一个点到终点的总伤害值,并保存下来,也是扫一遍就可以. 最后在询问的时候直接推断就可以,复杂度O(2*n). 代码例如以下: #include <cstdio> #include <cstring> #include <algorithm> using namespace std; #define maxn 110000 #define…

Killing Monsters Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 1993 Accepted Submission(s): 765 Problem Description Kingdom Rush is a popular TD game, in which you should build some towers to…

Killing Monsters Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1158 Accepted Submission(s): 527 Problem Description Kingdom Rush is a popular TD game, in which you should build some towers to p…

其实和昨天写的那道水题是一样的,注意爆LL $1<=n,k<=1e9$,$\sum\limits_{i=1}^{n}(k \mod i) = nk - \sum\limits_{i=1}^{min(n,k)}\lfloor\frac{k}{i}\rfloor i$ /** @Date : 2017-09-21 19:55:31 * @FileName: HDU 2620 分块底数优化 暴力.cpp * @Platform: Windows * @Author : Lweleth (SoungE…