题目链接 https://vjudge.net/problem/CodeForces-1132F 题面 Description You are given a string \(s\) of length \(n\) consisting of lowercase Latin ...
题面 Time limit per test: seconds Memory limit per test: megabytes Description You are given n strings a ,a , ,an: all of them have the same length m. The strings consist of lowercase English letters. ...
2020-05-25 00:31 4 428 推荐指数:
题目链接 https://vjudge.net/problem/CodeForces-1132F 题面 Description You are given a string \(s\) of length \(n\) consisting of lowercase Latin ...
Educational Codeforces Round 96 (Rated for Div. 2) E. String Reversal 题意 给定一个长度为\(n\)的字符串,每次操作可以交换两个相邻字符,问将原串倒置所需要的最小操作数。 限制 \(2\leq n\leq ...
http://codeforces.com/problemset/problem/1009/B B. Minimum Ternary String ...
🍅 🍅 🍅 题意:给定x0,y0,ax,ay,bx,by,一堆经验点:(x0,y0),(x1,y1) = (ax* x0+bx,ay*y0+by),起点(xs,ys),时间t,走一步都需要1单 ...
Suppose you have two points 𝑝=(𝑥𝑝,𝑦𝑝)p=(xp,yp) and 𝑞=(𝑥𝑞,𝑦𝑞)q=(xq,yq). Let's denote the Ma ...
[Codeforces 1214D]Treasure Island(dfs) 题面 给出一个n*m的字符矩阵,'.'表示能通过,'#'表示不能通过。每步可以往下或往右走。问至少把多少个'.'变成'#',才能让从(1,1)出发不能到达(n,m) \(n \times m \leq 10 ...
F. Xor-Paths time limit per test 3 seconds ...
这类问题一般是给出候选集合(一般为数组 array [ ])和一个限定值(S),然后让你求某一结果。 一般DFS与DP均可。下面谈谈这两种思维方式不同。 DFS一般是对数组array元素进行讨论,比如最后一个元素的有无。然后顺序递归,削减数组长度,通过递归遍历整个数组,得出最终结果。 比如全 ...