这个公式推导过程是看的这位大牛的http://blog.csdn.net/bigbigship/article/details/49123643 扩展欧几里德求模的逆元方法: #include <cstdio> #include <cstring> #include <algorithm> using namespace std; typedef long long ll; ; ll exgcd(ll a, ll b, ll &x, ll &y) { )…

Ant Time Limit: 1 Second      Memory Limit: 32768 KB There is an ant named Alice. Alice likes going hiking very much. Today, she wants to climb a cuboid. The length of cuboid's longest edge is n, and the other edges are all positive integers. Alice's…

Ant Time Limit: 1 Second      Memory Limit: 32768 KB There is an ant named Alice. Alice likes going hiking very much. Today, she wants to climb a cuboid. The length of cuboid's longest edge is n, and the other edges are all positive integers. Alice's…

链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=199 Point of Intersection Time Limit: 2 Seconds      Memory Limit: 65536 KB Given two circles on the same plane which are centered at (x1,y1) and (x2,y2) ,with radiuses r1 and r2, respecti…

赛后总结: TJ:今天我先到实验室,开始看题,一眼就看了一道防AK的题目,还居然觉得自己能做wwww.然后金姐和彭彭来了以后,我和他们讲了点题目.然后金姐开始搞dfs,我和彭彭看榜研究F题.想了很久脑子都炸了,做不下去了.然后在等金姐做完以后,彭彭说了D题题意,然后金姐开始写另外一道搜索题.做完两道搜索以后,金姐让我写那道线段树的题目.我搞了很久...然后超时了,因为要用素数筛,然后加了素数筛也做不出呜呜.金姐和彭彭把Ant的题目公式给搞出来了.开始敲.后来是因为取模的问题,就一直没搞成功.比赛…

Walking Ant Time Limit: 2 Seconds      Memory Limit: 65536 KB Ants are quite diligent. They sometimes build their nests beneath flagstones. Here, an ant is walking in a rectangular area tiled with square flagstones, seeking the only hole leading to h…

Walking Ant Time Limit: 2 Seconds      Memory Limit: 65536 KB Ants are quite diligent. They sometimes build their nests beneath flagstones. Here, an ant is walking in a rectangular area tiled with square flagstones, seeking the only hole leading to h…

其实zoj 3415不是应该叫Yu Zhou吗...碰到ZOJ 3415之后用了第二个参考网址的方法去求通项,然后这次碰到4870不会搞.参考了chanme的,然后重新把周瑜跟排名都反复推导(不是推倒)四五次才上来写这份有抄袭嫌疑的题解... 这2题很类似,多校的rating相当于强化版,不过原理都一样.好像是可以用高斯消元做,但我不会.默默推公式了. 公式推导参考http://www.cnblogs.com/chanme/p/3861766.html#2993306 http://www.cn…

转自——http://blog.csdn.net/qwe20060514/article/details/8112550 =============================以下是最小生成树+并查集======================================[HDU]1213   How Many Tables   基础并查集★1272   小希的迷宫   基础并查集★1325&&poj1308  Is It A Tree?   基础并查集★1856   More i…

传送门:zoj 3279 Ants Ants Time Limit: 2 Seconds      Memory Limit: 32768 KB echo is a curious and clever girl, and she is addicted to the ants recently. She knows that the ants are divided into many levels depends on ability, also, she finds the number…