题意 将一个长度为\(n\)的数组重复\(m\)遍得到一个长度为\(n \times m\)的新序列,然后消掉新序列中连续\(k\)个相同的元素,不断重复这一过程,求最后剩下的序列的长度 分析 首先可以明确一件事就是消除的顺序是任意的,最终得到的序列是相同的 消除的块有两种情况: 块在序列内部 块在序列交界处 首先可以消掉每个序列内部可以消去的块,然后再考虑第二部分 两个序列首位相接,每遇到\(k\)个连续的相同颜色的块就消去(注意消去的总长度不超过\(n\)),最终将一个序列分为左中右三部分…

题意 给定$n$个数,重复拼接$m$次,相邻$k$个重复的可消除,问最后序列中有多少个数 首先可以发现当$k>=n$时,如果要使$n$个数可以被消除,那么$n$个数必须一样,否则$n$个数不能被消除 当$k<n$时,首先对序列能够消除的消除,用栈记录每个数和这个数的相同的相邻个数$f$,将序列压缩,考虑一次拼接,记$L$为第二个序列的开始元素,$R$为第一个序列的最后一个元素,如果$L!=R$那么所有序列将不能压缩,如果$L==R,f_L+f_R!=k$,那么这两个序列拼接之后会合并成一个不可…

B. Teams Formation link http://codeforces.com/contest/878/problem/B describe This time the Berland Team Olympiad in Informatics is held in a remote city that can only be reached by one small bus. Bus has n passenger seats, seat i can be occupied only…

cf 443 D. Teams Formation(细节模拟题) 题意: 给出一个长为\(n\)的序列,重复\(m\)次形成一个新的序列,动态消除所有k个连续相同的数字,问最后会剩下多少个数(题目保证消除的顺序对答案不会造成影响) \(n <= 10^{5} ,m <= 10^{9} ,k <= 10^{9},a_i <= 10^{5}\) 思路: 直接上题解好了 首先要用栈预处理序列本身,然后考虑处理后的序列 比较头和尾是否能够消除,细节需要处理好. #include<bi…

题目链接:http://codeforces.com/contest/879/problem/D 题意:这题题意我反正是看了很久,可能是我的理解能力有点差,就是将一个数组倍增m倍然后将连续的相同的k个删除删到不能再删为止. 题解:这里m有点大肯定不能暴力所以可以考虑两个两个之间相互抵消比如 (1231) (1231) (1231) (1231) (1231) 第一部分的后半和第二部分的前半合并,第二部分后半和第三部分前半合并最后第一部分前半和最后一部分后半合并差不多就是这个意思然后就摸你一下就好…

http://codeforces.com/contest/879/problem/D This time the Berland Team Olympiad in Informatics is held in a remote city that can only be reached by one small bus. Bus has n passenger seats, seat i can be occupied only by a participant from the city a…

题意: 给定一长度为 n 的整数序列 $a$,将其复制m次,并接成一条链,每相邻K个相同的整数会消除,然后其他的整数继续结成一条链,直到不能消除为止,求问最终剩余多少个整数. 解法: 首先将长度为n的序列消干净,然后接下来的消除操作必然是在两个序列相交处进行消除,对于接在中间的序列,原消法等价于序列的左侧和右侧不停消除直到无法继续. 分类讨论: 1.序列左右消干净了,这样答案为0 2.序列消得剩下一种元素,统计该元素的总个数,如果K|sum,则为0,不然为sum%K个加上左右侧剩余元素. 3.序…

Codeforces Round #443 (Div. 2) codeforces 879 A. Borya's Diagnosis[水题] #include<cstdio> #include<cstring> #include<algorithm> using namespace std; int main(){ , s, d; scanf("%d", &n); while(n--) { scanf("%d%d", &a…

codeforces   478B  Random Teams  解题报告 题目链接:cm.hust.edu.cn/vjudge/contest/view.action?cid=88890#problem/B 题目: Description n participants of the competition were split into m teams in some manner so that each team has at least one participant. After th…

E. Two Teams time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are nn students standing in a row. Two coaches are forming two teams — the first coach chooses the first team and the sec…

http://codeforces.com/contest/1092/problem/B There are nn students in a university. The number of students is even. The ii-th student has programming skill equal to aiai. The coach wants to form n2n2 teams. Each team should consist of exactly two stu…

B. Alice, Bob, Two Teams 题目连接: http://www.codeforces.com/contest/632/problem/B Description Alice and Bob are playing a game. The game involves splitting up game pieces into two teams. There are n pieces, and the i-th piece has a strength pi. The way…

http://codeforces.com/contest/478/problem/B B. Random Teams time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output n participants of the competition were split into m teams in some manner so that…

Codeforces Round #598 (Div. 3)- E. Yet Another Division Into Teams - 动态规划 [Problem Description] 给你\(n\)个数,将其划分为多组,对于每个组定义其\(d\)值为 组内的最大值减最小值,问如何划分使得最终所有组的\(d\)值之和最小.每个组至少要保证有\(3\)个数. [Solution] 将所有值从小到大排序,然后我们知道最多有\(5\)个人划分到同一组中,如果有\(6\)个人,那么划分为两组一定比…

[CodeForces 1249A --- Yet Another Dividing into Teams] Description You are a coach of a group consisting of n students. The i-th student has programming skill ai. All students have distinct programming skills. You want to divide them into teams in su…

题目链接:http://codeforces.com/problemset/problem/478/B 题目意思:有 n 个人,需要将这班人分成 m 个 组,每个组至少含有一个人,同一个组里的人两两可以结交成一个pair,问怎样分配,可以使得 pair 数最少和最多,输出之. 首先最多 pair 数是很容易求出的,就是 m-1 个组里都放 1 个人,然后最后那个组(即第 m组)人数最多,pair数自然最多,答案就是 (n-m+1) * (n-m) / 2. 最少 pair 数,做的时候有一点点思…

A. Splitting in Teams time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There were n groups of students which came to write a training contest. A group is either one person who can write the…

题目: You are a coach at your local university. There are nn students under your supervision, the programming skill of the ii-th student is aiai. You have to form kk teams for yet another new programming competition. As you know, the more students are…

题目链接:https://codeforces.com/contest/1154/problem/E 题意: $n$ 个人排成一排,第 $i$ 个人的能力值为 $a[i]$,$a[1 \sim n]$ 是 $1 \sim n$ 的某个排列. 第一个教练先来拉人,他会拉目前还在队伍中的 $a[i]$ 最高的那个人,并且把排在它前面和后面的各自 $k$ 个人都拉走,即最多可以拉走 $2k + 1$ 个人. 然后,第二个教练来拉人,也是同样的操作.注意,如果当前被拉走的人的前面或者后面不足 $k$ 个…

题目链接:http://codeforces.com/problemset/problem/1154/E 题目大意: 有n个队员,编号1~n,每个人的能力各自对应1~n中的一个数,每个人的能力都不相同.有1号教练和2号教练,他们轮流从剩余队伍里选人,轮到某位教练选时,它总是选剩余队员中能力最强的人和他左右各k个人.问选完的时候每个人的组号. 分析: 什么结构能快速查找到队员呢?当然是数组啦!什么结构能频繁删改呢?当然是链表啦!所以就用承载在数组上的链表来做啦! 代码如下: #pragma GCC…

B. Random Teams time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output n participants of the competition were split into m teams in some manner so that each team has at least one participant. Afte…

题目链接:http://codeforces.com/contest/1133/problem/E 题目大意: 在n个人中找到k个队伍.每个队伍必须满足最大值减最小值不超过5.求满足条件k个队伍人数的总和的最大值. 这个题写DP很多的人应该可以很快写出来吧,毕竟不是很难. 思路: 反正最多n^2种状态.用数组存就好了. 先排序. 对于每个点,dp[a][b].表示a到n区间里分b个队伍的答案. 如果a是答案dp[a][b]所需要的,那么我们从a开始到a+i暴力一下(此时,x[a+i]-x[a]>…

B. Random Teams time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output n participants of the competition were split into m teams in some manner so that each team has at least one participant. Afte…

B. Alice, Bob, Two Teams time limit per test 1.5 seconds memory limit per test 256 megabytes input standard input output standard output Alice and Bob are playing a game. The game involves splitting up game pieces into two teams. There are n pieces,…

日常训练题解 D.Triangle Formation You are given N wooden sticks. Your task is to determine how many triangles can be made from the given sticks without breaking them. Each stick can be used in at most one triangle. Input The first line of each test case co…

  A. Splitting in Teams   time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There were n groups of students which came to write a training contest. A group is either one person who can write…

time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are nn students in a university. The number of students is even. The ii-th student has programming skill equal to aiai. The coach wants…

B. Random Teams   n participants of the competition were split into m teams in some manner so that each team has at least one participant. After the competition each pair of participants from the same team became friends. Your task is to write a prog…

题目链接:https://codeforces.com/contest/1133/problem/C 题意: 给出 $n$ 个数,选取其中若干个数分别组成 $k$ 组,要求每组内最大值与最小值的差值不超过5,求 $k$ 组合起来最多可以放多少个数. 题解: 将 $a[1 \sim n]$ 从小到大排序,排序后每个组必定可以视为数组 $a$ 上一段连续区间, $f[i][j]$ 表示到第 $i$ 个数为止,前面组成 $j$ 组,最多可以包含多少个数. 那么,考虑第 $i$ 个数选取与否,如果不选,…

E. Yet Another Division Into Teams There are n students at your university. The programming skill of the i-th student is ai. As a coach, you want to divide them into teams to prepare them for the upcoming ICPC finals. Just imagine how good this unive…