A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Each of the battleships can be marked a value of endurance. For every attack of our secret weapon, it…

During the War of Resistance Against Japan, tunnel warfare was carried out extensively in the vast areas of north China Plain. Generally speaking, villages connected by tunnels lay in a line. Except the two at the ends, every village was directly con…

Painting some colored segments on a line, some previously painted segments may be covered by some the subsequent ones. Your task is counting the segments of different colors you can see at last. Input The first line of each data set contains exactly…

题目链接:https://vjudge.net/problem/HDU-4027 A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Each of the battleships can be marked a value of endurance. F…

A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Each of the battleships can be marked a value of endurance. For every attack of our secret weapon, it…

思路:http://www.cnblogs.com/gufeiyang/p/4182565.html 写写线段树 #include <stdio.h> #include <string.h> #include <math.h> #include <algorithm> using namespace std; typedef long long LL; ; LL a[N<<]; void build(int rt,int l,int r){ if…

描述 A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Each of the battleships can be marked a value of endurance. For every attack of our secret weapon,…

Can you answer these queries? Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5195 Description A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapo…

传送门Can you answer these queries? 题意:线段树,只是区间修改变成 把每个点的值开根号: 思路:对[X,Y]的值开根号,由于最大为 263.可以观察到最多开根号7次即为1,则当根号次数大于等于7时,这段区间值为R-L+1,还有一点是L可能大于R. 以下来自鸟神:(真是强啊) 据这一性质,我们可以得到一种解决方案:对于修改,我们对于区间内的数不全为1的区间更新,直到遇到区间内的数全部为1的区间或者叶子结点为止.这样只要使用线段树,维护区间和的信息即可.  #inclu…

题意 : 给你N个数以及M个操作,操作分两类,第一种输入 "0 l r" 表示将区间[l,r]里的每个数都开根号.第二种输入"1 l r",表示查询区间[l,r]里所有数的和. 分析 : 不难想到用线段树,但是这里的线段树开根操作的更新很明显不能跟加减操作那样子通过Lazy Tag来实现,那么最笨的方法就是一直更新到叶子节点,不过这也就失去了线段树的高效性,每一次操作都更新到叶子节点的话会超时,此时来想想有没有什么规律可以减少操作的复杂度,细想就会发现在有限次的开根…