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…

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…

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…

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…

 Co-prime Array Time Limit:1000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 660A Description You are given an array of n elements, you must make it a co-prime array in as few moves as possible. In e…

[luogu P2205] [USACO13JAN]画栅栏Painting the Fence 题目描述 Farmer John has devised a brilliant method to paint the long fence next to his barn (think of the fence as a one-dimensional number line). He simply attaches a paint brush to his favorite cow Bessi…

B. Seating On Bus 题目连接: http://www.codeforces.com/contest/660/problem/B Description Consider 2n rows of the seats in a bus. n rows of the seats on the left and n rows of the seats on the right. Each row can be filled by two people. So the total capac…

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…

P2202 [USACO13JAN]方块重叠Square Overlap 题目描述 Farmer John is planning to build N (2 <= N <= 50,000) square fenced-in pastures on his farm, each of size exactly K x K (1 <= K <= 1,000,000). Pasture i is centered at point (x_i, y_i) with integer coo…

P3068 [USACO13JAN]派对邀请函Party Invitations 题目描述 Farmer John is throwing a party and wants to invite some of his cows to show them how much he cares about his herd. However, he also wants to invite the smallest possible number of cows, remembering all t…