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counting
牛客多校第八场 G-
Counting
regions(组合数学+几何欧拉公式)
Countingregions这道题呢,其实是一道组合数学的题,再加上欧拉公式。题意:问边数为奇数的正多边形所有的顶点两两相连,直线所分割的区域数量为多少,答案对1e9+71e9+7取模。我们会发现题目中的图形,除了顶点是不会有三线交于一点的。所以分割区域的区域数量就只取决于点的数量。现在我们未知:1.1.一共有多少条直线?2.2.这些直线在正多边形内的交点有多少个?答案11:我们都知道两点构成一
Sqwlly
·
2020-08-01 10:04
算法
ACM
牛客
数论
组合数学
ACM
欧拉公式
组合数学
牛客多校第八场G
hdu_5085_
Counting
problem(莫队分块思想)
题目连接:hdu_5085_Countingproblem题意:给你一个计算公式,然后给你一个区间,问这个区间内满足条件的数有多少个题解:由于这个公式比较特殊,具有可加性,我们考虑讲一个数分为两个部分,这样就可以用莫队的思想均摊时间复杂度,将9位数分为一个4位和一个5位,这里我感觉sqr为10000速度比较快。然后如果b小于sqr,那么直接暴力就行,如果b大于sqr,那么我们要把a和b都分为头部和
weixin_30448603
·
2020-08-01 03:11
codeforces1101D.GCD
Counting
数论+DP+dfs
D.GCDCountingtimelimitpertest4.5secondsmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputYouaregivenatreeconsistingofnnvertices.Anumberiswrittenoneachvertex;thenumberonvertexiiisequa
望舒丶
·
2020-08-01 00:41
搜索
数学
DFS
dp
HDU 2017 多校联合训练赛4 4003 6069
Counting
Divisors 素数筛和素因数分解
CountingDivisorsTimeLimit:10000/5000MS(Java/Others)MemoryLimit:524288/524288K(Java/Others)ProblemDescriptionInmathematics,thefunctiond(n)denotesthenumberofdivisorsofpositiveintegern.Forexample,d(12)=6
ykun_L
·
2020-07-31 20:01
HDU
2017
多校联合赛1
HDU 6069
Counting
Divisors -质因子个数-2017多校联盟4 第3题
CountingDivisorsTimeLimit:10000/5000MS(Java/Others)MemoryLimit:524288/524288K(Java/Others)TotalSubmission(s):1712AcceptedSubmission(s):623ProblemDescriptionInmathematics,thefunctiond(n)denotesthenumbe
lyyy.
·
2020-07-31 20:40
高精度
枚举
HDU 5085
Counting
problem
自己平时不大喜欢写题解啥的(太懒了……),但是难得发现一道网上没有题解的题啊哈哈哈哈,那我还是写下好了。题目地址:http://acm.hdu.edu.cn/showproblem.php?pid=5085题意:↑↑↑↑↑↑↑↑↑点上面自己看吧↑↑↑↑↑↑↑↑↑↑↑思路:看完了题目,是不是虽然可能没啥思路,但还是有点想法?提示一下,这题是被放在杭电集训队分块专题里面的一道题,所以这题应该莫队可解。
Brassica_
·
2020-07-31 17:04
数位dp
LFYZOJ 104
Counting
Swaps
题解#include#include#include#include#include#definelllonglongusingnamespacestd;constintMOD=1e9+9,MAXN=100005;intT,n,num[MAXN],head[MAXN],nume,id[MAXN],hav[MAXN];llfac[MAXN],ni[MAXN];structedge{intto,nxt
aiwa6731
·
2020-07-31 15:42
牛客网多校7 E
Counting
4-Cliques
链接:https://www.nowcoder.com/acm/contest/145/E来源:牛客网题目描述Youlovedoinggraphtheoryproblems.You’verecentlystumbleduponaclassicalproblem:Countthenumberof4-cliquesinanundirectedgraph.Givenanundirectedsimpleg
Tchitanda
·
2020-07-31 14:26
(2017多校训练第四场)HDU - 6069
Counting
Divisors 区间筛
下面的式子很容易得到。所以现在我们的问题就是把1e12量级的数字质因数分解,然后算用的素因子个数就行了。注意到一个数字a最小质因子肯定是小于等于根号a的。所以我们只需要打出1到1e6之间的素数表就行了。如果一个1e12次方量级的数字a,在被[1,1e6]内的素数分解了之后,剩下的数字还不是1,那么剩下来的那个数字肯定是一个大于1e6的质数。我们可以选择区间筛的方法,用[1,1e6]区间内的质数p去
Nicetomeetu-
·
2020-07-31 13:49
ACM-数论
2017杭电多校第四场1003
Counting
Divisors (分解质因数) hdu 6069
CountingDivisorsTimeLimit:10000/5000MS(Java/Others)MemoryLimit:524288/524288K(Java/Others)TotalSubmission(s):1374AcceptedSubmission(s):495ProblemDescriptionInmathematics,thefunctiond(n)denotesthenumbe
咿呀而已
·
2020-07-31 13:03
2017多校联赛
数论
比赛
[CodeForces 1101D] GCD
Counting
(树形 DP) | 错题本
文章目录题目分析错因代码题目[CodeForces1101D]GCDCounting分析将aua_uau分解质因数得到不同的质因子p[u]1,p[u]2,⋯ ,p[u]tp[u]_1,p[u]_2,\cdots,p[u]_tp[u]1,p[u]2,⋯,p[u]t。dp[u][i]dp[u][i]dp[u][i]表示从uuu向下只经过含因子p[u]ip[u]_ip[u]i的数能延伸的最长距离,转移的
ixRic
·
2020-07-31 11:40
[
错题本
]
#
点分治
#
树形
DP
《LOCALITY-CONSTRAINED SPATIAL TRANSFORMER NETWORKFOR VIDEO CROWD
COUNTING
》论文笔记
LOCALITY-CONSTRAINEDSPATIALTRANSFORMERNETWORKFORVIDEOCROWDCOUNTING论文地址论文翻译ABSTRACT1.INTRODUCTION2.RELATEDWORK3.OURAPPROACH3.1.Densitymapregressionmodule3.2.LSTmodule3.3.Lossfunction3.4.Implementationd
大王子呀
·
2020-07-30 21:42
人群密度
paper
浏览器 API 之 — Console API
在whatwg的规范中,console上的方法可以分为4类:Logging、
Counting
、Grouping、Timing。下面我们就逐个梳理一下。Loggingconsole提供了各种形式的日志
benwalker
·
2020-07-30 10:54
浏览器
API
1049
Counting
Ones (30分)
1049CountingOnes(30分)Thetaskissimple:givenanypositiveintegerN,youaresupposedtocountthetotalnumberof1’sinthedecimalformoftheintegersfrom1toN.Forexample,givenNbeing12,therearefive1’sin1,10,11,and12.Inpu
one joker
·
2020-07-30 06:09
PAT甲级
FreeRTOS中断管理--计数信号量
如果要使用计数信号量,必须在FreeRTOSConfig.h中将configUSE_
COUNTING
_SEMAPHORES设置为1。每次“给出”计数信号量时,都会使用其队列中的另一个空间。
Rookie on the road
·
2020-07-30 05:16
FreeRTOS
1004
Counting
Leaves(BFS)
1004CountingLeaves(30分)Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecon
Green Leaf of Rose
·
2020-07-30 01:54
BFS
Counting
Leaves
1004CountingLeaves(30)(30分)Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0us
绿蚁.r
·
2020-07-29 15:58
PAT甲级练习
Lake
Counting
(POJ-2386)
DescriptionDuetorecentrains,waterhaspooledinvariousplacesinFarmerJohn'sfield,whichisrepresentedbyarectangleofNxM(1#include#includeusingnamespacestd;charz[110][110];intn,m,dx[8]={-1,1,0,0,-1,-1,1,1},dy
绿蚁.r
·
2020-07-29 15:26
搜索&&最短路
Counting
Leaves (30)@Java
1004.CountingLeaves(30)时间限制400ms内存限制65536kB代码长度限制16000B判题程序Standard作者CHEN,YueAfamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontai
JacobGo
·
2020-07-29 03:20
PAT
后缀自动机——Boring
counting
题解:统计每个子串的最右位置和最左位置,在这个区间(左闭右开)里我们一定能够保证我们每个子串出现了2次。#includeusingnamespacestd;constintmaxn=2e5+10;constintmaxc=27;typedeflonglongll;structSuffix_Automaton{intnext[maxn=1;i--){//按拓扑序遍历inte=b[i];endpos[
行走天涯的豆沙包
·
2020-07-28 21:28
后缀自动机
1004
Counting
Leaves (30 分)
1004CountingLeaves(30分)Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecon
NCY_92377
·
2020-07-28 19:14
PAT
Counting
Leaves (30)
1004.CountingLeaves(30)时间限制400ms内存限制65536kB代码长度限制16000B判题程序Standard作者CHEN,YueAfamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontai
Datrilla
·
2020-07-28 14:30
queue
BFS
C++
数组邻接表
Counting
Leaves (30)
1004.CountingLeaves(30)时间限制400ms内存限制32000kB代码长度限制16000B判题程序Standard作者CHEN,YueAfamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontai
刺猬1012
·
2020-07-28 13:51
PAT
树
leetcode 338 :
Counting
Bits :找规律&位运算
338.CountingBitsMySubmissionsQuestionTotalAccepted:3211TotalSubmissions:5600Difficulty:MediumGivenanonnegativeintegernumbernum.Foreverynumbersiintherange0≤i≤numcalculatethenumberof1'sintheirbinaryrepr
smileyk
·
2020-07-28 11:24
【LeetCode】338 比特位计数 (C++)
原题地址:https://leetcode-cn.com/problems/
counting
-bits/题目描述:给定一个非负整数num。
rabbitsockx
·
2020-07-28 10:24
Leetcode
牛客PAT甲级练习题 1016
Counting
Leaves (30)
题意给出一棵树,要求输出每一层的叶子节点的数量,叶子节点的定义为没有子节点的节点。这题不难,不过很久不写了就写个博客记录一下吧。#include"bits/stdc++.h"usingnamespacestd;constintmaxn=110;vectornodes[maxn];mapans;intvis[maxn];voiddfs(intid,intdepth){if(vis[id]){retu
delicious__zen
·
2020-07-28 09:28
PAT
LeetCode338——比特位计数
我的LeetCode代码仓:https://github.com/617076674/LeetCode原题链接:https://leetcode-cn.com/problems/
counting
-bits
清風逐尘乀
·
2020-07-28 08:07
LeetCode题解
1004
Counting
Leaves (30 分)的解析与思路
Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0usingnamespaces
一入编程深似海啊
·
2020-07-28 07:59
PAT甲级真题(并查集)——1004
Counting
Leaves (30 分)
1004CountingLeaves(30分)Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecon
逃课去学习:)
·
2020-07-28 06:54
算法学习
并查集
1004
Counting
Leaves (30 分,附详细注释,逻辑分析)
写在前面实现思路深度有点遍历(BFS)vector容器封装树孩子节点递归更新每一层叶子节点个数、树的最大深度前提条件Forthesakeofsimplicity,letusfixtherootIDtobe01.知识盲点,学习ing,熟练耗时30分钟进军100分测试用例input:2101102output:01input:10output:1ac代码#include#include#include
kngines
·
2020-07-28 05:23
PAT(甲级)
算法比赛相关
(java)Pat刷题日记-1004
Counting
Leaves (30 分)
一开始自己做的真的很乱,把题目搞错了借鉴了一下别的大神,自己模仿着写了一遍其实是一道考图的遍历的题目,用了DFS来做importjava.util.ArrayList;importjava.util.HashMap;importjava.util.Scanner;publicclassMain{publicstaticvoidmain(String[]args){Scannerin=newScan
Togyu
·
2020-07-28 05:20
Counting
Leaves
题目描述Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0#include#includeusingname
柯森锎
·
2020-07-28 04:43
PAT甲级
指数型母函数(
Counting
Sequences II)
泰勒展开公式:常见的公式:ex=1+x+x22!+x33!+...e^{x}=1+x+\dfrac{x^2}{2!}+\dfrac{x^3}{3!}+...ex=1+x+2!x2+3!x3+...e−x=1−x+x22!−x33!+...e^{-x}=1-x+\dfrac{x^2}{2!}-\dfrac{x^3}{3!}+...e−x=1−x+2!x2−3!x3+...ekx=1+kx+k2x22
JK Chen
·
2020-07-28 00:27
ACM中的数学问题合集
数论/数学
知识点
PAT-1004
Counting
Leaves
1004CountingLeaves(30分)Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecon
EricMac
·
2020-07-27 21:08
浙大PAT-Advanced
Automatic Reference
Counting
自动引用计数
原文地址:http://clang.llvm.org/docs/AutomaticReferenceCounting.html1.Aboutthisdocument1.1.PurposeThefirstandprimarypurposeofthisdocumentistoserveasacompletetechnicalspecificationofAutomaticReferenceCounti
baozhifei
·
2020-07-27 19:00
Counting
Leaves (30)
Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0#includeusingnamespacestd;str
我是QQ浩
·
2020-07-27 18:21
浙大PAT
[PAT] 1004
Counting
Leaves (30 分)Java
Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0list;14HashMap>
Simma1101
·
2020-07-27 17:09
Automatic Reference
Counting
http://clang.llvm.org/docs/AutomaticReferenceCounting.htmlAutomaticReferenceCounting1.Aboutthisdocument1.1.Purpose1.2.Background1.3.Evolution2.General3.Retainableobjectpointers3.1.Retaincountsemantics
MAZHEN1986
·
2020-07-27 16:35
2012-7
MAC
Objective-C
PAT练习题(甲级) 1004
Counting
Leaves (30分)(Java实现)
PAT练习题1004CountingLeaves(Java)题目题意解题思路代码实现题目Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachc
嗯哼→_→
·
2020-07-27 14:40
PAT练习题
PAT甲级-1004
Counting
Leaves (30分)
点击链接PAT甲级-AC全解汇总题目:Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecontain
邂逅模拟卷
·
2020-07-16 06:59
PAT
PAT甲级1004
Counting
Leaves
1004.CountingLeaves(30)CHEN,YueAfamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontainsonetestcase.Eachcasestartswithalinecontainin
大唐忽悠
·
2020-07-16 05:06
数据结构
PAT--1004
Counting
Leaves (30 分)
Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputSpecification:Eachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0#includeusingna
jackson_j
·
2020-07-16 00:56
练习--PAT
338
Counting
Bits(ok);191(ok);190(ok);231(ok);326(see)
啊哈哈哈哈,好久没写代码了,居然一把过了,好开心!338:简单voidadd_One(string&s,int&num){intinc=1;for(inti=s.size()-1;i>=0;i--){intt=(inc+s[i]-'0')%2;inc=(inc+s[i]-'0')/2;if(s[i]=='1'){if(!t)num--;s[i]='0'+t;}else{if(t)num++;s[i
jinzi锦梓
·
2020-07-16 00:37
leetcode
hdu5952
Counting
Cliques
一个关于图的需要dfs+剪枝的暴力题,想了半天没什么思路,后来室友和我说的想法。因为给你一个图,数大小为s的联通图的个数,连通图就是所有的点两两相连通,首先遍历i从1~n,找到和i相邻的点,如果i的度数大于s-1,那么把所有和i相邻并且度数大于s-1的点加入到一个队列(数组)中,对这个队列进行dfs找联通图的个数就行了。一个是要想到怎么遍历的,另外一个就是dfs函数怎么写。#includeusin
hi_just_do_it
·
2020-07-15 23:22
dfs
找规律
【PAT 甲级】1004
Counting
Leaves (30)(30 分)(dfs/bfs)
题目链接Afamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontainsonetestcase.Eachcasestartswithalinecontaining0#include#include#include#
feng_zhiyu
·
2020-07-15 22:54
PAT
搜索
Counting
Leaves (30)
1004.CountingLeaves(30)时间限制400ms内存限制65536kB代码长度限制16000B判题程序Standard作者CHEN,YueAfamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontai
a1025461748
·
2020-07-15 19:03
PAT甲级练习
Counting
Leaves
题目链接:https://www.patest.cn/contests/pat-a-practise/1004题意,给我们一棵家族树,给出这棵树的每一条边,问我们每一层没有子节点的节点数。题意是非常的清晰,我们只需要在建立好的树上从根节点(01)开始遍历整棵树,在遍历的时候记录当前的层数即可。#include#include#include#include#include#includeusing
RaAlGhul
·
2020-07-15 18:33
ACM_暴力.搜索.模拟
PAT考题练习题解
PAT甲级 1004
Counting
Leaves (30分)
这种树形关系的题,像祖辈关系,师徒关系的,第一考虑的就应该是dfs或者并查集,这道题我用的dfs,代码很短,套一套,略微修改一下基本上就ok了!#includeusingnamespacestd;intchild[105]={0};vectornodes[105];intmaxlevel=0;voiddfs(intnode,intlevel){if(nodes[node].size()==0){c
Ash_x
·
2020-07-15 17:30
PAT甲级
PAT甲级 1004
Counting
Leaves (30 分) 题解 DFS/BFS
1004CountingLeaves(30分)Timelimit:400msMemorylimit:64MBSourcelimit:16KBAfamilyhierarchyisusuallypresentedbyapedigreetree.Yourjobistocountthosefamilymemberswhohavenochild.InputEachinputfilecontainsonete
Dragon风星泪
·
2020-07-15 17:02
PAT甲级
PAT甲级题目1004
Counting
Leaves
题目大意:hierarchy(层级)pedigree(家谱)给出家谱,求出没有孩子的家庭成员输入:①第一行两个整数N:树中节点个数M:非叶子节点个数②剩下M行,每行格式为:IDKID[1]ID[2]…ID[K]ID:两位数表示一个非叶子节点K:孩子的个数然后接着K个孩子的ID③根节点为01输出:输出每一层上叶子节点的个数思路:用vector数组v保存每个节点的孩子ID,数组number保存每层上叶
Mr Zhang.
·
2020-07-15 16:44
PAT甲级题目
算法
数据结构
队列
PAT
真题
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