luoguP3071 [USACO13JAN]座位Seating

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luoguP3071 [USACO13JAN]座位Seating

https://www.luogu.org/problem/P3071 AC代码: https://www.luogu.org/blog/user33426/solution-p3071 莫名其妙RE: #include<cstdio> #include<iostream> using namespace std; #define MAX 500005 #define lson o<<1 #define rson o<<1|1 int n,m,ans,cnt…

洛谷 P3071 [USACO13JAN]座位Seating（线段树）

P3071 [USACO13JAN]座位Seating 题目链接思路: 一开始把题给读错了浪费了好多时间呜呜呜. 因为第二个撤离操作是区间修改,所以我们可以想到用线段树来做.对于第一个操作,我们只需要维护suml,sumr,sum分别表示当前结点左端连续有多少个空位.右端连续有多少个空位.以及最长连续空位为多少就行了.因为每次安排作为可能会跨过mid,所以我们还需要数组来维护一下信息. 注意一下代码的细节吧: #include <bits/stdc++.h> using namespace…

洛谷 P3071 [USACO13JAN]座位Seating-线段树区间合并(判断找，只需要最大前缀和最大后缀)+分治+贪心

P3071 [USACO13JAN]座位Seating 题目描述 To earn some extra money, the cows have opened a restaurant in their barn specializing in milkshakes. The restaurant has N seats (1 <= N <= 500,000) in a row. Initially, they are all empty. Throughout the day, there…

[USACO13JAN] Seating

https://www.luogu.org/problem/show?pid=3071 题目描述 To earn some extra money, the cows have opened a restaurant in their barn specializing in milkshakes. The restaurant has N seats (1 <= N <= 500,000) in a row. Initially, they are all empty. Throughout…

【vijos】1286 座位安排（状压dp）

https://vijos.org/p/1286 这题好神不会捉... 首先我们知道所有情况有C(n*m, k)种,这个好搞.但是两两不相邻这个有点难搞.. 原来是状压dp..sigh. 设状态f[i][j][k]表示第i行放置的摆放状态是j放了k个人的方案,那么有 f[i][j][k]=sum{f[i-1][x][k-num[x]]},当j的人两两不冲突,且j和x的人两两不冲突,num[x]是x状态的人的数量最后不冲突的数目是sum{f[n][j][k]},k是题目所给的,j是所有的状态显…

Educational Codeforces Round 11B. Seating On Bus 模拟

地址:http://codeforces.com/contest/660/problem/B 题目: B. Seating On Bus time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Consider 2n rows of the seats in a bus. n rows of the seats on the left…

CSU 1997: Seating Arrangement【构造】

1997: Seating Arrangement Description Mr. Teacher老师班上一共有n个同学,编号为1到n. 在上课的时候Mr. Teacher要求同学们从左至右按1, 2, …, n的顺序坐成一排,这样每个同学的位置是固定的,谁没来上课就一目了然了. 但是时间长了之后,Mr. Teacher发现坐得离得远的同学往往因为交流很少而逐渐变得生疏了,于是他决定重新安排同学们的座位,并且在新的座位安排中,任意两个相邻的同学的编号之差的绝对值都必须大于d. 现在Mr. Tea…