题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6183 题意: 有四种操作: 0:清除所有点 1 x y c : 给点(x, y)添加一种颜色c(颜色不会覆盖) 2 x y1 y2 : 在(0, y1)与(x, y2)所围成的矩形里有多少种颜色 3 : 程序结束 解法: 颜色最多51种.我们就建51棵线段树. 每个线段树按y轴建树,每个结点的值是在范围内的最小的x值,这题最关键的就是看到是x轴是查1-x 队友的CDQ+线段树因为写错了一句话,重现赛…

B - Color itHDU - 6183 题目大意:有三种操作,0是清空所有点,1是给点(x,y)涂上颜色c,2是查询满足1<=a<=x,y1<=b<=y2的(a,b)点一共有几种不同的颜色 一开始做的时候直接就是开51个vector保存每个颜色相应的点,然后就是询问就是,暴力循环判断这个颜色存不存在一个满足条件的点,感觉最差情况下应该会超时,不过却过了 #include<cstdio> #include<vector> using namespace…

区间交 Time Limit: 8000/4000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 849    Accepted Submission(s): 377 Problem Description 小A有一个含有n个非负整数的数列与m个区间.每个区间可以表示为li,ri. 它想选择其中k个区间, 使得这些区间的交的那些位置所对应的数的和最大. 例如样例中,选择[2,5]…

[POJ 2777] Count Color(线段树区间更新与查询) Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 40949   Accepted: 12366 Description Chosen Problem Solving and Program design as an optional course, you are required to solve all kinds of problems. Here…

Snacks HDU 5692 dfs序列+线段树 题意 百度科技园内有n个零食机,零食机之间通过n−1条路相互连通.每个零食机都有一个值v,表示为小度熊提供零食的价值. 由于零食被频繁的消耗和补充,零食机的价值v会时常发生变化.小度熊只能从编号为0的零食机出发,并且每个零食机至多经过一次.另外,小度熊会对某个零食机的零食有所偏爱,要求路线上必须有那个零食机. 为小度熊规划一个路线,使得路线上的价值总和最大 输入输出: 输入数据第一行是一个整数T(T≤10),表示有T组测试数据. 对于每组数据,…

Count Color poj2777 线段树 题意 有一个长木板,现在往上面在一定区间内刷颜色,后来刷的颜色会掩盖掉前面刷的颜色,问每次一定区间内可以看到多少种颜色. 解题思路 这里使用线段树,因为刷颜色可以看作是区间修改,使用lazy标记区间的颜色种类,下传标记后,当前节点的lazy标记就标记为0,然后使用vis数组来标记颜色(颜色种类很少).剩下的基本就是线段树的模板了. 代码实现 #include<cstdio> #include<cstring> #include<…

题目原网址:http://acm.hdu.edu.cn/showproblem.php?pid=6183 题目中文翻译: Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 132768/132768 K (Java/Others) Total Submission(s): 1677    Accepted Submission(s): 500 Problem Description 你喜欢画画吗? Little D不喜欢画画,特别…

Do you like painting? Little D doesn't like painting, especially messy color paintings. Now Little B is painting. To prevent him from drawing messy painting, Little D asks you to write a program to maintain following operations. The specific format o…

Color it Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 132768/132768 K (Java/Others) Problem Description Do you like painting? Little D doesn't like painting, especially messy color paintings. Now Little B is painting. To prevent him from…

题目链接 http://acm.hdu.edu.cn/showproblem.php?pid=5091 Problem Description Recently, the γ galaxies broke out Star Wars. Each planet is warring for resources. In the Star Wars, Planet X is under attack by other planets. Now, a large wave of enemy spaces…