A Cubic number and A Cubic Number Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others) Total Submission(s): 4947    Accepted Submission(s): 1346 Problem Description A cubic number is the result of using a whole number i…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6212 解法:看了眼题就发现这个BZOJ 1032不是一毛一样?但是BZOJ上那是个巨坑,数据有错,原来A的是一个假题..2333,但是我并不知道POJ上也有这个题2333...网赛现场没做出来,感觉现场做出来的很多都知道这个题是原题吧..参考这个论文:http://www.docin.com/p-685411874.html 解法:这个题主要是区间DP的转移怎么写? 有三种消除方式: 1.直接将区间…

Chinese Zodiac Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others) Total Submission(s): 2451    Accepted Submission(s): 1645 Problem Description The Chinese Zodiac, known as Sheng Xiao, is based on a twelve-year cycle,…

Chenchen, Tangtang and ZengZeng are starting a game of tic-tac-toe, played on a 3 × 3 board. Initially, all squares on the board are empty and they takes turns writing the first letter of their name into any of the empty squares (because Chenchen, Ta…

Walk Through Squares Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 200    Accepted Submission(s): 57 Problem Description   On the beaming day of 60th anniversary of NJUST, as a military colleg…

补题系列之西安网络赛1011 题目大意:给定一个椭球: 求它到原点的最短距离. 思路: 对于一个椭球的标准方程 x^2/a^2 + y^2/b^2 +z^2/c^2=1 来说,它到原点的最短距离即为min(a,b,c) 所以我们需要把原方程化为标准型. 这时候线代就排上用场了,注意到原方程是一个二次型. 化为标准型 1/(k1)*x^2+1/(k2)*y^2+1/(k3)*z^2=1 后  min(k1,k2,k3)即为答案 而这里的1/k1,1/k2,1/k3 就是二次型矩阵的特征值 如何求特…

题目链接  2016 青岛网络赛  Problem C 题意  给出一些敏感词,和一篇文章.现在要屏蔽这篇文章中所有出现过的敏感词,屏蔽掉的用$'*'$表示. 建立$AC$自动机,查询的时候沿着$fail$指针往下走,当匹配成功的时候更新$f[i]$ $f[i]$表示要屏蔽以第$i$个字母结尾的长度为$f[i]$的字符串. #include <bits/stdc++.h> using namespace std; #define rep(i, a, b) for (int i(a); i &l…

题目连接 : https://nanti.jisuanke.com/t/A1256 Life is a journey, and the road we travel has twists and turns, which sometimes lead us to unexpected places and unexpected people. Now our journey of Dalian ends. To be carefully considered are the following…

题目链接 裸的结论题.百度 Ramsey定理.刚学过之后以为在哪也不会用到23333333333,没想到今天网络赛居然出了.顺利在题面更改前A掉~~~(我觉得要不是我开机慢+编译慢+中间暂时死机,我还能再早几分钟过掉它 #include<bits/stdc++.h> using namespace std; ][]; int n; void solve() { ; i<=n; i++) ; j<=n; j++) ; k<=n; k++) { if(g[i][j]==g[i][…

题目连接 Problem There is a tree with n nodes. For each node, there is an integer value ai, (1≤ai​≤1,000,000,000 for 1≤i≤n). There is q queries which are described as follow: Assume the value on the path from node a to node b is t0​,t1​,⋯tm​. You are sup…