题目链接: Mountaineers  Gym - 102021M 题目大意:给你一个n*m的矩阵,a[i][j]代表当前方块的高度,然后每次询问给你一个起点和终点,然后问你在这个图上你选择一条路径,使得这条路径上的最大值尽可能的小,然后输出最大值. 具体思路:用最小生成树进行建图,首先对每个点的权值按照从小到大进行排序.每次是把上一次连通块的根作为当前的节点的儿子.正好保证了整个图是联通的,并且询问起点和中点的时候,在树上找lca就可以了. AC代码: #include<bits/stdc++…

Mountaineers 时间限制: 3 Sec  内存限制: 128 MB 题目描述 The Chilean Andes have become increasingly popular as a destination for backpacking and hiking. Many parts of the Andes are quite remote and thus dangerous. Because of this, the Ministry of Tourism wants to…

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2018 German Collegiate Programming Contest (GCPC 18) Attack on Alpha-Zet 建树,求lca 代码: #include <algorithm> #include <iterator> #include <iostream> #include <cstring> #include <cstdlib> #include <iomanip> #include <bit…

NLTK 这是一个处理文本的python库,我们知道文字性的知识可是拥有非常庞大的数据量,故而这属于大数据系列. 本文只是浅尝辄止,目前本人并未涉及这块知识,只是偶尔好奇,才写本文. 从NLTK中的book模块中,载入所有条目 book 模块包含所有数据 from nltk.book import * *** Introductory Examples for the NLTK Book *** Loading text1, ..., text9 and sent1, ..., sent9 Ty…

B .Battle Royale 题意:给你两个点A,B,以及一个圆S,保证两个点在圆外,且其连线与圆相交,求两点间最短距离. 思路:显然是要分别与圆相切,然后在圆弧想走,直到相交. 那么ans=与圆相交的直线距离+圆弧上的距离: 前者不难求. 后者的话有些抽象,因为不知道怎么取固定角度,但是如果想到atan2了就不难了,因为atan2求出的角度是固定了标准的,注意对用两个atan2求出来的角度求其夹角时,注意不要错过2pi:同时取min(angle,2*pi-angle).  还不懂的,看代码…

“TAKE ONLY memories, leave only footprints” is more than a hiking motto at the Sagarmatha National Park in Nepal. The large box of rocks sitting next to the metal detector at the local airport is a testament to that: tourists departing from Mount Eve…