问题描述 LG-SP1043 题解 GSS 系列第一题. \(q\) 个询问,求 \([x,y]\) 的最大字段和. 线段树,维护 \([x,y]\) 的 \(lmax,rmax,sum,val\) ,向上合并即可. 但是注意询问过程中也需要维护这些信息. \(\mathrm{Code}\) #include<bits/stdc++.h> using namespace std; template <typename Tp> void read(Tp &x){ x=0;ch…

SPOJ GSS1_Can you answer these queries I(线段树区间合并) 标签(空格分隔): 线段树区间合并 题目链接 GSS1 - Can you answer these queries I You are given a sequence A1, A[2], ..., A[N] . ( |A[i]| ≤ 15007 , 1 ≤ N ≤ 50000 ). A query is defined as follows: Query(x,y) = Max { a[i]+a…

Can you answer these queries I SPOJ - GSS1 You are given a sequence A[1], A[2], -, A[N] . ( |A[i]| ≤ 15007 , 1 ≤ N ≤ 50000 ). A query is defined as follows: Query(x,y) = Max { a[i]+a[i+1]+-+a[j] ; x ≤ i ≤ j ≤ y }. Given M queries, your program must o…

Can you answer these queries? Time Limit:2000MS     Memory Limit:65768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4027 Description A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use…

Can you answer these queries? Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others) Total Submission(s): 16260    Accepted Submission(s): 3809 Problem Description A lot of battleships of evil are arranged in a line befor…

Description You are given a sequence A[1], A[2], ..., A[N] . ( |A[i]| ≤ 15007 , 1 ≤ N ≤ 50000 ). A query is defined as follows: Query(x,y) = Max { a[i]+a[i+1]+...+a[j] ; x ≤ i ≤ j ≤ y }. Given M queries, your program must output the results of these…

[题目分析] 线段树裸题. 注意update的操作,写结构体里好方便. 嗯,没了. [代码] #include <cstdio> #include <cstring> #include <cmath> #include <cstdlib> #include <map> #include <set> #include <queue> #include <string> #include <iostream&…

https://cn.vjudge.net/problem/HDU-4027 题意 给一个有初始值的数组,存在两种操作,T=0时将[L,R]的值求平方根,T=1时查询[L,R]的和. 分析 显然不符合加法合并原理,只能考虑直接点更新,可这样就完蛋了..突破口在于sqrt,2^63-1只需要sqrt了6.7次就变为1了,而1再sqrt也无意义.所以在更新时,只要这段区间的和等于区间长度,说明都为1,那么就不需要继续更新下去了.查询时就是区间求和. #include <iostream> #inc…

SP1043 GSS1 - Can you answer these queries I 题目描述 给出了序列A[1],A[2],-,A[N]. (a[i]≤15007,1≤N≤50000).查询定义如下: 查询(x,y)=max{a[i]+a[i+1]+...+a[j]:x≤i≤j≤y}. 给定M个查询,程序必须输出这些查询的结果. 输入输出格式 输入格式: 输入文件的第一行包含整数N. 在第二行,N个数字跟随. 第三行包含整数M. M行跟在后面,其中第1行包含两个数字xi和yi. 输出格式:…

GSS7 Can you answer these queries IV 题目:给出一个数列,原数列和值不超过1e18,有两种操作: 0 x y:修改区间[x,y]所有数开方后向下调整至最近的整数 1 x y:询问区间[x,y]的和 分析: 昨天初看时没什么想法,于是留了个坑.终于在今天补上了. 既然给出了1e18这个条件,那么有什么用呢?于是想到了今年多校一题线段树区间操作时,根据一些性质能直接下沉到每个节点,这里可以吗?考虑1e18开方6次就下降到1了,因此每个节点最多被修改6次.于是我们每…