6656 Watching the KangarooDay by day number of Kangaroos is decreasing just liketiger, whale or lions. So I decided to make them a sanctuarywhere they will live peacefully. I do not let visitors gonear them. So I planted some display screen outside t…

题意:给你一些区间,再查询一些点,问这些点与所有区间形成的最小距离的最大值.最小距离定义为:如果点在区间内,那么最小距离为0,否则为min(pos-L[i],R[i]-pos). 解法:当然要排个序,仔细想想会发现我们要找的区间的位置满足二分性质,即如果此时pos-L[mid] >= R[mid]-pos,那么我们要找的区间肯定是mid或大于mid,否则,我们要找的区间一定是mid即mid以下.二分找到即可.预处理时要把嵌套在别的区间里的区间忽略掉,因为外面那个区间一定比他更优. 代码: #in…

题意:n条线段(n <= 100000) (L<=R <= 1e9) ,m组询问(m <= 100000) 每次询问一个点的覆盖范围的最大值.一个点x对于一条包括其的线段,覆盖范围为min(x-L,R-x) 思路:考虑将线段一份为二,对于左边的那部分,以右端点排序,然后 二分找到右端点恰好满足的那个点为id,那么接下来要做的就是就是在[id,n]这个范围内找到L最小的那个点,能够通过求前缀最大来得到.那么左边最大距离为  seg[id].L-preLMax[id],右边最大的求法也…

C. Watching Fireworks is Fun time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output A festival will be held in a town's main street. There are n sections in the main street. The sections are numb…

Write a definition for a class named Kangaroo with the following methods: An __init__ method that initializes an attribute named pouch_contents to an empty list A method named put_in_pouch that takes an object of any type and adds it to pouch_content…

http://codeforces.com/contest/373/problem/E E. Watching Fireworks is Fun time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output A festival will be held in a town's main street. There are n sectio…

题目链接:10339 - Watching Watches 题意:两个时钟,一个每天慢a秒,一个每天慢b秒,问两钟重新相遇的时刻 1圈有12 * 60 * 60秒,然后1圈 / abs(a - b),就可以求出多少天会相遇,然后就能求出A钟一共慢了多少秒,进而可以求出该时刻的时和分! 下面给出AC代码: #include <bits/stdc++.h> using namespace std; int k,m; int main() { while(~scanf("%d%d"…

运行reactnative项目时在编译过程中报错 Error watching file for changes: EMFILE 故障原因: 是升级后watchman不可用了,需要重装watchman. 解决方案 第一种解决方案是打开终端后依次键入以下命令: 1.卸载原来安装的watchman: brew uninstall --force watchman 2.删除原来的安装文件: rm -rf /usr/local/var/run/watchman/ 3.重新安装watchman: brew…

题目链接:http://codeforces.com/gym/101981/problem/K Your friend has made a computer video game called “Kangaroo Puzzle” and wants you to give it a try for him. As the name of this game indicates, there are some (at least 2) kangaroos stranded in a puzzle…

We spend a full five hours and 16 minutes a day in front of a screen, and that's without even turning on a television. So says a statistic from eMarketer, a research firm that focuses on digital media and marketing. It says that for the first time we…