(待补) A. Pieces of Parentheses 将括号处理完成后排序,方式参加下面的博客.然后做一遍背包即可. 2018 Multi-University Training Contest 1 Balanced Sequence(贪心) #include <cstdio> #include <cstring> #include <algorithm> #include <iostream> using namespace std; const i…

(待补) A. Fancy Antiques 爆搜. B. Alternative Bracket Notation C. Greetings! D. Programming Team 0/1分数规划 + 树上依赖型背包. E. K-Inversions 将 A 和 B 的相对位置看做多项式,用FFT,最后统计系数. #include <bits/stdc++.h> using namespace std; const double pi = acos(-1.0); struct comp{…

NAIPC 2017 Yin and Yang Stones 75.39% 1000ms 262144K   A mysterious circular arrangement of black stones and white stones has appeared. Ming has been tasked with balancing the stones so that only one black and one white stone remain. Ming has two ope…

A family of nn gnomes likes to line up for a group picture. Each gnome can be uniquely identified by a number 1..n1..n written on their hat. Suppose there are 55 gnomes. The gnomes could line up like so: 1, 3, 4, 2, 51,3,4,2,5. Now, an evil magician…

Consider an n \times mn×m matrix of ones and zeros. For example, this 4 \times 44×4: \displaystyle \begin{matrix} 1 & 1 & 1 & 1 \\ 0 & 1 & 1 & 1 \\ 0 & 1 & 1 & 1 \\ 0 & 1 & 1 & 0 \end{matrix}1000​1111​1111​1…

Consider nn initial strings of lower case letters, where no initial string is a prefix of any other initial string. Now, consider choosing kk of the strings (no string more than once), and concatenating them together. You can make this many such comp…

A. Cut it Out! 枚举第一刀,那么之后每切一刀都会将原问题划分成两个子问题. 考虑DP,设$f[l][r]$表示$l$点顺时针一直到$r$点还未切割的最小代价,预处理出每条边的代价转移即可. 时间复杂度$O(n^3)$. #include<cstdio> #include<cmath> #include<algorithm> using namespace std; const int N=422; const double eps=1e-8; const…

layout: post title: (寒假开黑gym)2017-2018 ACM-ICPC German Collegiate Programming Contest (GCPC 2017) author: "luowentaoaa" catalog: true tags: mathjax: true - codeforces 传送门 付队! 许老师! B.Buildings (polya定理) 题意 B:给你m面墙,每面墙是n*n的格子,你有c种颜色,问你有多少种涂色方案.用po…

2017 United Kingdom and Ireland Programming Contest (UKIEPC 2017) 寒假第一次组队训练赛,和学长一起训练,题目难度是3颗星,我和猪队友写了6题,第二次训练赛,题目难度2颗星,写出了8道题,两次比赛都不是第一,差一点,很伤. 这是第一次训练的题解,第二次的在上一篇博客,本来不想今天写题解的,但是明天又有新的训练. 写吧写吧,谁让我是最菜的(:´д｀)ゞ,随便写写,头疼...因为是PDF的题目,不贴题目了,直接上代码... A Alie…

2017-2018 ACM-ICPC Nordic Collegiate Programming Contest (NCPC 2017) 今日份的训练,题目难度4颗星,心态被打崩了,会的算法太少了,知道要用什么写,但是写不出来啊(抱头痛哭)和猪队友一共写出来3道题,本来I题应该可以写出来的,有向图求最小环输出路径就可以,But,没有板子啊!!!(｡•́︿•̀｡) 赛后补题,补一下I(单独写),D题和E题表示读不懂题,不知道要干嘛,D题是bfs+位运算 ,E题是bfs+优先队列,题意都读不懂,题解…