[题目链接] https://www.lydsy.com/JudgeOnline/problem.php?id=5142 [算法] 首先用RMQ预处理S数组的最大值 然后我们枚举右端点 , 通过二分求出合法的 , 最靠右的左端点 , 用这段区间的最大值更新答案 , 即可 时间复杂度 : O(NlogN) [代码] #include<bits/stdc++.h> using namespace std; typedef long long LL; ; ; const LL INF = 1e18;…

5142: [Usaco2017 Dec]Haybale Feast Time Limit: 10 Sec  Memory Limit: 128 MBSubmit: 182  Solved: 131[Submit][Status][Discuss] Description Farmer John is preparing a delicious meal for his cows! In his barn, he has NN haybales (1≤N≤100,0 00). The iith…

Description Farmer John is preparing a delicious meal for his cows! In his barn, he has NN haybales (1≤N≤100,0 00). The iith haybale has a certain flavor Fi (1≤Fi≤10^9) and a certain spiciness Si(1≤Si≤10^9). The meal will consist of a single course,…

Description The cows, who always have an inferiority complex about their intelligence, have a new guessing game to sharpen their brains. A designated 'Hay Cow' hides behind the barn and creates N (1 ≤ N ≤ 1,000,000) uniquely-sized stacks (convenientl…

[题目链接] https://www.lydsy.com/JudgeOnline/problem.php?id=5141 [算法] 树形DP 时间复杂度 : O(N) [代码] #include<bits/stdc++.h> using namespace std; typedef long long LL; ; ; ; struct edge { int to , nxt; } e[MAXN << ]; int n , k , tot; int color[MAXN] , hea…

[题目链接] https://www.lydsy.com/JudgeOnline/problem.php?id=5139 [算法] 二分答案 时间复杂度 : O(NlogN^2) [代码] #include<bits/stdc++.h> using namespace std; ; int n; int a[MAXN] , b[MAXN]; template <typename T> inline void chkmax(T &x,T y) { x = max(x,y);…

我又开始水了,感觉又是一道虚假的蓝题 题意 非常好理解,自己看吧 题解 可以比较轻易的发现,如果对于一段满足和大于等于 \(m\) 的区间和其满足和大于等于 \(m\) 的子区间来说,选择子区间肯定是不会更劣的,所以对于一个右边界 \(r\) ,我们只需要找出满足条件的最大的左边界 \(l\) ,就可以更新答案了. 不难发现,这个左右边界都是单调递增的,所以可以考虑尺取法,同时在维护一个区间最大值. 维护区间最大值的东西有很多:线段树,\(st\) 表,单调队列,平衡树(\(set\))--随便…

\(10^18\)是要long long的. \(nlogn\)单调队列上维护\(logn\)线段树. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> #define R(a,b,c) for(register int a = (b); a <= (c); ++ a) #define nR(a,b,c…

Problem 2. Fruit Feast 很简单的智商题(因为碰巧脑出来了所以简单一,一 原题: Bessie has broken into Farmer John's house again! She has discovered a pile of lemons and a pile of oranges in the kitchen (effectively an unlimited number of each), and she is determined to eat as m…

Your Ride Is Here It is a well-known fact that behind every good comet is a UFO. These UFOs often come to collect loyal supporters from here on Earth. Unfortunately, they only have room to pick up one group of followers on each trip. They do, however…