链接: https://codeforces.com/contest/1182/problem/C 题意: You are given n words, each of which consists of lowercase alphabet letters. Each word contains at least one vowel. You are going to choose some of the given words and make as many beautiful lyric…

Codeforces Round #566 (Div. 2) A Filling Shapes 给定一个 \(3\times n\) 的网格,问使用 这样的占三个格子图形填充满整个网格的方案数 如果 \(n\) 是奇数,那么显然无解,否则考虑每个 \(3\times2\) 的方格正好能塞下两个这玩意而且必须这样塞进去,方案数为 \(2\),因此答案为 \(2^{n/2}\) B Plus from Picture 给定一个 \(h\times w\) 的矩阵,每个元素为 "." 或者…

时间\(9.05\)好评 A Filling Shapes 宽度为\(3\),不能横向填 考虑纵向填,长度为\(2\)为一块,填法有两种 如果长度为奇数则显然无解,否则\(2^{n/2}\) B Plus from Picture 找到最靠上的十字轮廓(没有则直接无解),删掉后判断有无多余 C Beautiful Lyrics 以元音数量及最后的元音(如果没有元音的那些分别赋不同的负数)为一二关键词 开两个栈,代表诗头和诗尾 排序后,得到的以第一关键字的块,尽量把每一对放到诗尾,因为诗尾的也可以…

C. Beautiful Numbers 题目连接: http://www.codeforces.com/contest/300/problem/C Description Vitaly is a very weird man. He's got two favorite digits a and b. Vitaly calls a positive integer good, if the decimal representation of this integer only contains…

B. Beautiful Paintings 题目连接: http://www.codeforces.com/contest/651/problem/B Description There are n pictures delivered for the new exhibition. The i-th painting has beauty ai. We know that a visitor becomes happy every time he passes from a painting…

链接: https://codeforces.com/contest/1265/problem/E 题意: Creatnx has n mirrors, numbered from 1 to n. Every day, Creatnx asks exactly one mirror "Am I beautiful?". The i-th mirror will tell Creatnx that he is beautiful with probability pi100 for al…

链接: https://codeforces.com/contest/1265/problem/D 题意: An integer sequence is called beautiful if the difference between any two consecutive numbers is equal to 1. More formally, a sequence s1,s2,-,sn is beautiful if |si−si+1|=1 for all 1≤i≤n−1. Trans…

链接: https://codeforces.com/contest/1265/problem/C 题意: So the Beautiful Regional Contest (BeRC) has come to an end! n students took part in the contest. The final standings are already known: the participant in the i-th place solved pi problems. Since…

链接: https://codeforces.com/contest/1265/problem/B 题意: You are given a permutation p=[p1,p2,-,pn] of integers from 1 to n. Let's call the number m (1≤m≤n) beautiful, if there exists two indices l,r (1≤l≤r≤n), such that the numbers [pl,pl+1,-,pr] is a…

链接: https://codeforces.com/contest/1265/problem/A 题意: A string is called beautiful if no two consecutive characters are equal. For example, "ababcb", "a" and "abab" are beautiful strings, while "aaaaaa", "abaa&…