OJ题号:洛谷2880 思路1: 线段树维护区间最大最小值. #include<cstdio> #include<cctype> #include<utility> #include<algorithm> inline int getint() { char ch; bool sgn=false; while(!isdigit(ch=getchar())) if(ch=='-') sgn=true; '; )+x)<<)+(ch^'); retu…

题意:给你一组数,询问\(q\)次,问所给区间内的最大值和最小值的差. 题解:经典RMQ问题,用st表维护两个数组分别记录最大值和最小值然后直接查询输出就好了 代码: int n,q; int a[N]; int dp1[N][30],dp2[N][30]; int lg[N]; void lg_Init(){ for(int i=1;i<=n;++i){ int k=0; while(1<<(k+1)<=i) k++; lg[i]=k; } } void RMQ_Init1(){…

维护区间最值的模板题. 1.树状数组 1 #include<bits/stdc++.h> 2 //树状数组做法 3 using namespace std; 4 const int N=5e4+10; 5 int m,ma[N],mi[N],n,c[N]; 6 7 int lowbit(int x){ 8 return x&(-x); 9 } 10 11 void ins(int x,int v){ 12 while(x<=n){ 13 ma[x]=max(ma[x],v);mi…

题面:P2880 [USACO07JAN]平衡的阵容Balanced Lineup 题解: ST表板子 代码: #include<cstdio> #include<cstring> #include<iostream> #define max(a,b) ((a)>(b)?(a):(b)) #define min(a,b) ((a)<(b)?(a):(b)) using namespace std; ,max_log=,maxlog=,inf=<<…

题面:P2880 [USACO07JAN]平衡的阵容Balanced Lineup RMQ问题:给定一个长度为N的区间,M个询问,每次询问Li到Ri这段区间元素的最大值/最小值. RMQ的高级写法一般有两种,即为线段树(并不很会╥﹏╥...)和ST表(一种利用dp求解区间最值的倍增算法) 定义:maxx[i][j]和minn[i][j]分别表示i到i+2^j-1这段区间的最大值和最小值. 预处理:maxx[i][0]=minn[i][0]=a[i].即i到i区间的最大值.最小值都是a[i]. 状…

P2880 [USACO07JAN]平衡的阵容Balanced Lineup RMQ RMQ模板题 静态求区间最大/最小值 (开了O2还能卡到rank9) #include<iostream> #include<cstdio> #include<cstring> #include<cctype> using namespace std; template <typename T> inline T min(T &a,T &b) {…

题目背景 题目描述: 每天,农夫 John 的N(1 <= N <= 50,000)头牛总是按同一序列排队. 有一天, John 决定让一些牛们玩一场飞盘比赛. 他准备找一群在对列中为置连续的牛来进行比赛. 但是为了避免水平悬殊,牛的身高不应该相差太大. John 准备了Q (1 <= Q <= 180,000) 个可能的牛的选择和所有牛的身高 (1 <= 身高 <= 1,000,000). 他想知道每一组里面最高和最低的牛的身高差别. 输入: 第1行:N,Q 第2到N…

[USACO07JAN]平衡的阵容Balanced Lineup 题目描述 For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a game of Ultimate Frisbee with some of the cows. To keep things simple, he w…

Balanced Lineup Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 32820   Accepted: 15447 Case Time Limit: 2000MS Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer Joh…

Balanced Lineup Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 40493 Accepted: 19035 Case Time Limit: 2000MS Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John de…