题意:给你一个序列(长度不超过2^17),支持两种操作:单点修改:询问区间中最小的ai*aj是多少(i可以等于j). 只需要线段树维护区间最小值和最大值,如果最小值大于等于0,那答案就是minv*minv: 如果最大值小于等于零,那么答案就是maxv*maxv: 要是最小值小于零,最大值大于零,答案就是minv*maxv. #include<cstdio> #include<cstring> #include<algorithm> using namespace std…

#1586 : Minimum 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 You are given a list of integers a0, a1, …, a2^k-1. You need to support two types of queries: 1. Output Minx,y∈[l,r] {ax∙ay}. 2. Let ax=y. 输入 The first line is an integer T, indicating the number…

https://hihocoder.com/problemset/problem/1586 线段树操作,原来题并不难..... 当时忽略了一个重要问题,就是ax*ay要最小时,x.y可以相等,那就简单了!结果显然是模最小的数的平方或者是个负数. 要求乘积最小只要求区间内最大值.最小值和绝对值小的数,再判断min,max正负就行了. 下面的代码相当于建了三个树分别存Min,Max,Mid(abs(Min)) #include<iostream> #include<cstdio> #i…

时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 You are given a list of integers a0, a1, …, a2^k-1. You need to support two types of queries: 1. Output Minx,y∈[l,r] {ax∙ay}. 2. Let ax=y. 输入 The first line is an integer T, indicating the number of test cases. (…

编号 名称 通过率 通过人数 提交人数 A√水题(队友写的 Visiting Peking University 91% 1122 1228 B— Reverse Suffix Array 57% 68 119 C最大子矩阵和 Matrix 51% 182 353 D缩点/二分/数位dp Agent Communication 11% 23 209 E凸包 Territorial Dispute 57% 327 567 F— Cake 15% 15 95 G√找规律 Bounce 74% 456…

#1586 : Minimum Time Limit:1000ms Case Time Limit:1000ms Memory Limit:256MB Description You are given a list of integers a0, a1, …, a2^k-1. You need to support two types of queries: 1. Output Minx,y∈[l,r] {ax∙ay}. 2. Let ax=y. Input The first line is…

描述 You are given a list of integers a0, a1, …, a2^k-1. You need to support two types of queries: 1. Output Minx,y∈[l,r] {ax∙ay}. 2. Let ax=y. 输入 The first line is an integer T, indicating the number of test cases. (1≤T≤10). For each test case: The fi…

#1582 : Territorial Dispute 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 In 2333, the C++ Empire and the Java Republic become the most powerful country in the world. They compete with each other in the colonizing the Mars. There are n colonies on the Mars,…

#1584 : Bounce 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 For Argo, it is very interesting watching a circle bouncing in a rectangle. As shown in the figure below, the rectangle is divided into N×M grids, and the circle fits exactly one grid. The bouncing…

#1578 : Visiting Peking University 时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 Ming is going to travel for n days and the date of these days can be represented by n integers: 0, 1, 2, …, n-1. He plans to spend m consecutive days(2 ≤ m ≤ n)in Beijing. Durin…