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线段树之区间更新 Tunnel Warfare

Description 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 dire

Tunnel Warfare(线段树)

题目 Sample Input 7 9 D 3 D 6 D 5 Q 4 Q 5 R Q 4 R Q 4 Sample Output 1 0 2 4 有三种操作,D是删点,Q是询问点x还和几个点连着,R是恢复最近一次被摧毁的点。对点x,连接着的点的个数显然是右边最近的一个被摧毁的点的坐标减去左边最近的一个点的坐标再减1,即右区间最小值-左

UVa 1416 - Warfare And Logistics (最短路树)

题目链接:https://onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&category=0&problem=4162&mosmsg=Submission+received+with+ID+26583689 题目要求所有点对间的最短路之和,因为是稀疏图,floyd 和 dijstra 差不多,如果枚举 m 条边每次求一遍答案,时间

hdu 1540 Tunnel Warfare

Problem Solution 维护一个线段树,对于D和R的操作用单点修改。 对于Q的询问: 发现就是找\(x\)能最长的延伸出去的长度,那么我们左右两边二分一下即可,check函数就是长度是否等于和。 时间复杂度\(\mathcal{O}(T \cdot m \log^2{n})\) 注意要多测为啥我都没读出要多测 # include <bits

【春节补档】11/30 模拟赛 T3 warfare

各位春节快乐! 注: 原出题人未知。如有版权问题请私信我,我会撤下这篇文章。 神仙题,第一步就较难想出。 首先,对于任意状态 S = { a

线段树 区间合并 / 分块 - HDU - 1540 - Tunnel Warfare

线段树 区间合并 - HDU - 1540 - Tunnel Warfare 个人解法 思路介绍 1. 建树 所需要的全局变量 int stk_ptr = 0; // 栈顶指针 int stk[N]; // 模拟栈 char cmd[5]; // 接受命令'D','R','Q' int find_leaf[N]; // 根据村庄编号访问其代表的叶子结点的序号 pii get_lr[N<<2]; // 获

Tunnel Warfare HDU - 1540 (最长区间合并)

Tunnel Warfare HDU - 1540  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 vi

Tunnel Warfare

HDU 1540 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

E - Tunnel Warfare (线段树求最长连续区间)

题目链接:https://vjudge.net/contest/332656#problem/E   思路: lmax 记录左边开始的最大连续区间, rmax 记录右边开始的最大连续区间 然后维护这两个值就可以了 主要是利用了线段树 (nod<<1) 、 ((nod<<1)+1) 所记录的区间是连续的特点   具体的解释还是看代码注释吧   1 #in

hdu 1540 Tunnel Warfare (线段树维护一维联通区间)

题意: 一维线段上n个点,有摧毁和修复两种操作,询问某点最大的可达区域 思路: 线段树维护\(lsum\)代表区间左端点开始最长联通区域,\(rsum\)代表右端点开始最长联通区域.单点修改只有\(push_up\)操作,用左子树\(lsum\)更像\(lsum\),右子树\(rsum\)更新\(rsum\) #include<string>

WordPress Social Warfare组件 远程代码漏洞执行详细复现

0x00前言 今天在知道创宇上发现3月26日提交WordPress XSS和远程代码执行漏洞,于是试着复现了下远程代码执行漏洞 该漏洞源于Social Warfare组件,并且版本<=3.5.2、且要是管理员登录状态,因此该漏洞是个后台代码执行 漏洞报告https://www.webarxsecurity.com/social-warfare-vulnerabil