A - A codeforces 714A Description Today an outstanding event is going to happen in the forest — hedgehog Filya will come to his old fried Sonya! Sonya is an owl and she sleeps during the day and stay awake from minute l1 to minute r1 inclusive. Also,…

A - Complete the Word(暴力) Description ZS the Coder loves to read the dictionary. He thinks that a word is nice if there exists a substring (contiguous segment of letters) of it of length 26 where each letter of English alphabet appears exactly once.…

A - ACodeForces 1060A Description Let's call a string a phone number if it has length 11 and fits the pattern "8xxxxxxxxxx", where each "x" is replaced by a digit. For example, "80123456789" and "80000000000" are ph…

A - A  这题很巧妙啊,前两天刚好做过,而且就在博客里  Little C Loves 3 I time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little C loves number «3» very much. He loves all things about it. Now he has a positive in…

A - A CodeForces - 1042A There are nn benches in the Berland Central park. It is known that aiai people are currently sitting on the ii-th bench. Another mm people are coming to the park and each of them is going to have a seat on some bench out of n…

山东省ACM多校联盟省赛个人训练第六场 D Rotating Scoreboard https://vjudge.net/problem/POJ-3335 时间限制:C/C++ 1秒,其他语言2秒 空间限制:C/C++ 262144K,其他语言524288K 64bit IO Format: %lld 题目描述 This year, ACM/ICPC World finals will be held in a hall in form of a simple polygon. The coac…

t1应该比较水所以我都没看 感觉从思路上来说都不难(比牛客网这可简单多了吧) 第五场 t2: 比较套路的dp f[i]表示考虑前i个数,第i个满足f[i]=i的最大个数 i能从j转移需要满足 j<i ai>aj i-j>=ai-aj 比较easy的套路就是由2,3可以推出1 于是按照ai排序再拿个树状数组维护就行了 t3: 考虑一段编号能否成立 等价于求树链的并 然后发现对于l1>l2 r1>=r2 也就是说右端点单调 于是我们考虑做two-point-two 至于树链的并就…

NOI.AC NOIP模拟赛 第六场 游记 queen 题目大意: 在一个\(n\times n(n\le10^5)\)的棋盘上,放有\(m(m\le10^5)\)个皇后,其中每一个皇后都可以向上.下.左.右.左上.左下.右上.右下这\(8\)个方向移动.其中每一个皇后可以攻击这八个方向上离它最近的皇后. 求有多少皇后被攻击到\(0,1,\ldots,8\)次. 保证\(m\)个皇后中任意两个不在同一个位置. 思路: 考虑左右方向的攻击,对每一行开一个set,按列编号插入,看一下是否存在前驱/后…

A.codeforces1038A You are given a string ss of length nn, which consists only of the first kk letters of the Latin alphabet. All letters in string ss are uppercase. A subsequence of string ss is a string that can be derived from ss by deleting some o…

A - Turn the Rectangles CodeForces - 1008B There are nn rectangles in a row. You can either turn each rectangle by 9090 degrees or leave it as it is. If you turn a rectangle, its width will be height, and its height will be width. Notice that you can…