Description For a set of sequences of integers{a1,a2,a3,...an}, we define a sequence{ai1,ai2,ai3...aik}in which 1<=i1<i2<i3<...<ik<=n, as the sub-sequence of {a1,a2,a3,...an}. It is quite obvious that a sequence with the length n has 2^n…

Counting Haybales 时间限制: 50 Sec  内存限制: 256 MB提交: 52  解决: 18[提交][状态][讨论版] 题目描述 Farmer John is trying to hire contractors to help rearrange his farm, but so far all of them have quit when they saw the complicated sequence of instructions FJ wanted them…

描述 The cows have once again tried to form a startup company, failing to remember from past experience t hat cows make terrible managers!The cows, conveniently numbered 1-N1-N (1≤N≤100,000), organize t he company as a tree, with cow 1 as the president…

[题目链接] http://www.lydsy.com/JudgeOnline/problem.php?id=4756 [题目大意] 给出一棵树,对于每个节点,求其子树中比父节点大的点个数 [题解] 我们考虑每个权值建立一棵线段树,边dfs边将子节点合并为一颗线段树, 那么只要查询当前点的树上后缀和即可. [代码] #include <cstdio> #include <algorithm> #include <cstring> #include <vector&…

传送门 此题很有意思,有多种解法 1.用天天爱跑步的方法,进入子树的时候ans-query,出去子树的时候ans+query,query可以用树状数组或线段树来搞 2.按dfs序建立主席树 3.线段树的合并 前两个都会,于是学习一下线段树的合并.. 道理用文字解释不清...直接看代码就能看懂.. 可以脑补出,合并的操作复杂度是logn的,总时间复杂度nlogn #include <cstdio> #include <cstring> #include <iostream>…

题目链接: Counting Intersections Time Limit: 12000/6000 MS (Java/Others)     Memory Limit: 65536/65536 K (Java/Others) Problem Description Given some segments which are paralleled to the coordinate axis. You need to count the number of their intersection…

题面:P3605 [USACO17JAN]Promotion Counting晋升者计数 题解:这是一道万能题,树状数组 || 主席树 || 线段树合并 || 莫队套分块 || 线段树 都可以写..记得离散化 线段树合并版: #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> using namespace std; ; ,edge_head[maxn],W[ma…

题目传送门 Promotion Counting 题目描述 The cows have once again tried to form a startup company, failing to remember from past experience that cows make terrible managers! The cows, conveniently numbered 1 \ldots N1…N (1 \leq N \leq 100,0001≤N≤100,000), organ…

Counting Sequences Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/65536 K (Java/Others) Total Submission(s): 2335    Accepted Submission(s): 820 Problem Description For a set of sequences of integers{a1,a2,a3,...an}, we define a sequen…

版权声明:欢迎关注我的博客.本文为博主[炒饭君]原创文章,未经博主同意不得转载 https://blog.csdn.net/a1061747415/article/details/25471349 Problem A : Counting Squares pid=1264" rel="nofollow">From:HDU, 1264 Problem Description Your input is a series of rectangles, one per lin…