Portal Description \(n(n\leq10^5)\)个洞排成一条直线,第\(i\)个洞有力量值\(a_i\),当一个球掉进洞\(i\)时就会被立刻弹到\(i+a_i\),直到超出\(n\).进行\(m(m\leq10^5)\)次操作: 修改第\(i\)个洞的力量值\(a_i\). 在洞\(x\)上放一个球,问该球几次后被哪个洞弹飞出界. Solution 将\(n\)个洞分成大小为\(\sqrt n\)的\(\sqrt n\)个块. \(c[i]\)记录\(i\)要跳出所在的块…

E. Holes Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/13/problem/E Description Little Petya likes to play a lot. Most of all he likes to play a game «Holes». This is a game for one person with following rules: There are…

E. Holes time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output Little Petya likes to play a lot. Most of all he likes to play a game «Holes». This is a game for one person with following rules: Th…

一.问题提出 这是一个来自"answerOpenCV"(http://answers.opencv.org/question/200422/opencv-c-filling-holes/)整编如下: title:OpenCV / C++ - Filling holes content: Hello there, For a personnel projet, I'm trying to detect object and there shadow. These are the resu…

文件stat结构体中st_size成员 对于所有的文件类型,st_size成员对其中的普通文件.目录以及符号链接有实在的意义.其中,对于普通文件而言,st_size记录了该文件的实际大小:对于目录而言,st_size的值为16或者512的倍数:对于符号链接而言,st_size的值为符号链接所指的路径的长度.例如lib->usr/lib,则st_size的值即为7. 在某些Unix系统中,st_size的值对pipe等文件也有意义,表示当前pipe中可以读取的字节数. Holes产生的原因 当我们…

CF13E Holes LG传送门 双倍经验题,几乎同[HNOI2010]弹飞绵羊,LCT练手题,LG没有LCT题解于是发一波. 从当前点向目标点连边,构成一棵树,带修改就用LCT动态维护答案,由于不用查询修改链上信息,不需要与makeroot有关的函数.分块也可以写. 不会LCT的话可以看看我的LCT总结. #include<cstdio> #include<cctype> #define R register #define I inline using namespace s…

http://codeforces.com/problemset/problem/797/F F. Mice and Holes time limit per test             1.5 seconds memory limit per test       256 megabytes input standard input output standard output One day Masha came home and noticed n mice in the corri…

题目链接: E. Holes time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output Little Petya likes to play a lot. Most of all he likes to play a game «Holes». This is a game for one person with following rul…

E. Holes time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output Little Petya likes to play a lot. Most of all he likes to play a game «Holes». This is a game for one person with following rules: Th…

noip模拟赛,挺良心的题,考的贼烂(膜一下@来日方长大佬(sdfz rank1)) 不多说了,看题吧 1.tower 题面: 铁塔(tower.pas/c/cpp) 题目描述 Rainbow和Freda要在PoeticIsland市的一座山脚下盖房子定居了......盖房子需要钢材,幸运的是,这里有排成一行的n座废弃的铁塔,从左到右编号为1~n,其中第i座的高度为h[i].Rainbow和Freda想盖一座上面小下面大的城堡,并且城堡的层数尽可能多.因此,他们要把这些铁塔分成尽量多组,每组内的…