apples

Minimum Time to Collect All Apples in a Tree

Givenanundirectedtreeconsistingofnverticesnumberedfrom0ton-1,whichhassomeapplesintheirvertices.Youspend1secondtowalkoveroneedgeofthetree.Returntheminimumtimeinsecondsyouhavetospendinordertocollectalla
ForABiggerWorld·2020-08-04 10:40

Delicious Apples (hdu 5303 贪心+枚举)

DeliciousApplesTimeLimit:5000/3000MS(Java/Others)MemoryLimit:524288/524288K(Java/Others)TotalSubmission(s):395AcceptedSubmission(s):122ProblemDescriptionTherearenappletreesplantedalongacyclicroad,whic
浪子小黄人·2020-08-03 05:59

hdu6333 Harvest of Apples(莫队+求组合数)

既不会莫队，也不会求组合数，GG。莫队讲解：http://www.cnblogs.com/CsOH/p/5904430.html#4034690逆元求组合数:https://blog.csdn.net/arrowlll/article/details/526294481.为什么用莫队算法？题目最坏情况有10W(次查询)*10W(每次查询(10W,10W))，这样绝对超时。推公式：我们定义S(n,m
勤勤勤能补拙·2020-08-01 08:45

2018 Multi-University Training Contest 4 Harvest of Apples （Hdu6333-分块莫队）

ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):1717AcceptedSubmission(s):659ProblemDescriptionTherearenapplesonatree,numberedfrom1t
yiyiLy·2020-08-01 08:38

Harvest of Apples

问题B:HarvestofApples时间限制:1Sec内存限制:128MB提交:18解决:11[提交][状态][讨论版][命题人:admin]题目描述Therearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.输入ThefirstlineoftheinputcontainsanintegerT(1
weixin_30764883·2020-08-01 03:59

Harvest of Apples（组合数+莫队）

hdu6333ProblemB.HarvestofApples题目传送门题意：求(0,n)~(m,n)组合数之和题解：C(n,m)=C(n-1,m-1)+C(n-1,m)设S(n,m)=C(n,0)+C(n,1)+C(n,2)+。。。+C(n,m)然后将S(n,m)通过第一个公式拆项最后化简变为S(n,m)=2*S(n-1,m)-C(n-1,m);即：所以可以离线用莫队算法参考博客：链接1、链接2
weixin_30329623·2020-08-01 03:42

Harvest of Apples (莫队+组合数学)

题意：计算C(n,0)到C(n,m)的和，T(Tusingnamespacestd;typedeflonglongLL;constintmaxn=1e5+5;constintmod=1e9+7;LLfac[maxn],inv[maxn];LLrev2;LLqpow(LLb,intn){LLres=1;while(n){if(n&1)res=res*b%mod;b=b*b%mod;n>>=1;}re
weixin_30268071·2020-08-01 03:00

Harvest of Apples （排列组合+莫队）

HDU-6333-ProblemB.HarvestofApples题意：一颗树上有n颗苹果，求取不多于m个苹果有多少种拿法令，F(n,m)即为n颗苹果拿不多于m个的方法的种数且可以打个表或者手算出前面几行，就可以发现已知F(n,m)就可以推出F(n-1,m)，F(n+1,m)，F(n,m-1)，F(n,m+1)#include#include#include#include#includeusin
vloai·2020-08-01 02:45

hdu 6333 Harvest of Apples

题目：点击打开链接题意：给出T组n和m（1#include#include#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusingnamespacestd;#definedebugtest#definemst(ss,b)m
Self-Discipline·2020-08-01 01:45

harvasst of apples（组合数）（乘法逆元）（莫队算法）

ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):1529AcceptedSubmission(s):171ProblemDescriptionTherearenapplesonatree,numberedfrom1t
SadSummerHoliday·2020-08-01 00:25

Harvest of Apples【组合数+莫队+费马小快速幂】

题意：给m,n求S(m,n)S(m,n)=C(m,n)+C(m,n-1)+...+C(m,0);思路：在讲思路之前先写一个杨辉三角的规律不难发现从第二行起每行除1以外的每一个数都等于它肩上两个数的和即C(n,m)=C(n-1,m-1)+C(n-1,m)通过上面的公式我们还可以推出S(n,m)=2*S(n-1,m)-C(n-1,m)举个例子S(5,3)=C(5,3)+C(5,2)+C(5,1)+C(
everduo·2020-07-31 23:12

Harvest of Apples （莫队，逆元，组合数学）（这样预处理正确吗？）

题干：Therearennapplesonatree,numberedfrom11tonn.Countthenumberofwaystopickatmostmmapples.InputThefirstlineoftheinputcontainsanintegerTT(1≤T≤105)(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsists
韬光养晦_·2020-07-31 23:25

杭电多校赛4 HDU - 6333 Harvest of Apples

Therearennapplesonatree,numberedfrom11tonn.Countthenumberofwaystopickatmostmmapples.InputThefirstlineoftheinputcontainsanintegerTT(1≤T≤105)(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsistsofo
untilyouydc·2020-07-31 23:53

Harvest of Apples （莫队算法+数学思维）

ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):2073AcceptedSubmission(s):804ProblemDescriptionTherearenapplesonatree,numberedfrom1t
等我学会后缀自动机·2020-07-31 22:45

HDU - 6333 Harvest of Apples （莫队）

题目链接题意：求出C(n,0)~C(n,m)的和，mod1e9+7。分析：题目给的数据范围1#definemst(a,b)memset(a,b,sizeof(a))#defineALL(x)x.begin(),x.end()#definepiipair#defineeps1e-8inlineintlowbit(intx){returnx&-x;}constintN=1e5+10;constlong
purple_bro·2020-07-31 21:59

Harvest of Apples

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
孤独灬旅人·2020-07-31 19:12

Java提高—对象克隆（复制）/对象属性拷贝

很简单：intapples=5;intpears=apples;不仅仅是int类型，其它七种原始数据类型(boolean,char,byte,short,float,double.long)同样适用于该类情况
May的博客·2020-07-31 19:24

Harvest of Apples

考场上看到这个题的时候，我记得这个式子好像是不能化简的==，所以我就开始想能不能从c(m,0)+c(m,1)+...+c(m,m)轻松推出c(n,0)+c(n,1)+c(n,2)....+c(n,m)，因为前者就是2^m，如果能O(1)从m扩大到n就行了，结果发现从c(m,0)+c(m,1)=sum1(1)式推到c(m+1，0)+c(m+1,1)+..c(m+1,m)=sum2(2)式的规律c(m
二分抄代码·2020-07-31 19:39

Harvest of Apples 莫队.....

/**链接:http://acm.hdu.edu.cn/showproblem.php?pid=6333题意:n个不相同的数取最多为m的取法数;NTT多了一个log好像直接测就T了赛后了解正解为莫队时G++;**********tricks****a[i].ra[i].1输入.分析组合数的lr与nm的状态转移关系;确定初始lr值;*/#include#definelllonglongusingna
布呗之路·2020-07-31 18:59

Harvest of Apples——莫队

题意：Therearennapplesonatree,numberedfrom11tonn.Countthenumberofwaystopickatmostmmapples.思路：sum(n,m)=2sum(n-1,m)-c(n-1,m)sum(n,m)=sum(n,m-1)+c(n,m)可以发现若知道了sum(n,m)可以在O（1）时间内推出sum(n-1,m),sum(n,m-1),sum(n
hao_zong_yin·2020-07-31 17:32

按字母顺序排列数组，对象和对象数组

数组：letfruits=[`bananas`,`Apples`,`Oranges`];您可以按字母顺序排序，如下所示：fruits.sort();但是请注意数组中的大小写不一致…大写字符将全部排在小写字符之前
cunqu9743·2020-07-31 16:16

hdu 6333 Harvest of Apples

#include#include#include#includeusingnamespacestd;constintmaxn=1e5+10;constintblock=1e3+5;typedeflonglongLL;constintmod=1e9+7;LLinv[maxn],sum[block][maxn],c[block][block];LLpows(LLa,intb){LLres=1;whil
一只叫橘子的猫·2020-07-31 16:00

Harvest of Apples HDU - 6333（莫队）

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
babing2770·2020-07-31 15:32

Harvest of Apples(预处理+莫队)

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
闻道-问道·2020-07-31 15:54

Harvest of Apples

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
YVVVVY·2020-07-31 15:19

HDU6333 Harvest of Apples

http://acm.hdu.edu.cn/showproblem.php?pid=6333ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.题意：T(10万)组询问，每次询问∑i=0mC(n,i)\sum_{i=0}^{m}C(n,i)∑i=0mC(n
a-free-man·2020-07-31 15:25

Harvest of Apples

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
WN_795·2020-07-31 15:15

HDU 5303 Delicious Apples (贪心 枚举 好题)

DeliciousApplesTimeLimit:5000/3000MS(Java/Others)MemoryLimit:524288/524288K(Java/Others)TotalSubmission(s):199AcceptedSubmission(s):54ProblemDescriptionTherearenappletreesplantedalongacyclicroad,which
_TCgogogo_·2020-07-31 14:35

HDU 6333 Harvest of Apples (莫队算法)

hdu6333给出n和m，求C(n,0)+C(n,1)+...+C(n,m)的值。把结果定义为S(n,m)，可以得到S(n,m)=S(n-1,m)+S(n-1,m-1)，由此就有S(n,m)=S(n,m-1)+C(n,m)=2*S(n-1,m)-C(n,m)。也就是说根据S(n,m)我们可以在O(1)的时间里求出S(n-1,m),S(n,m-1),S(n+1,m),S(n,m+1)，于是就可以用莫
nwpu_suixy·2020-07-31 14:23

Harvest of Apples

http://acm.hdu.edu.cn/showproblem.php?pid=6333题意：求c(n,0)到c(n,m)的和t组数据每次累加一定会超时得到公式s(n,m)=s(n-1,m)-c(n-1,m);用莫队算法处理t组查询#include#include#include#include#defineLLlonglongusingnamespacestd;constintmod=1e9
ZZZ19880423·2020-07-31 14:41

Harvest of Apples（莫队 组合数）

题目连接http://acm.hdu.edu.cn/showproblem.php?pid=6333题目大意：题意很简单，不多说分析；T×N超时，莫队优化一下，官方题解AC代码:/*************************************************Author:NIYOUDUOGAOLastmodified:2018-08-0212:42Email:pjm000@16
你有多高·2020-07-31 14:04

Harvest of Apples（莫队）

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=6333题意：求C(n,0)+C(n,1)+...+C(n,m)的和思路：题解说可以莫队做，知道S(n,m)即可向附近项转化，想想也是，然后就写了下。(S(n,m)为前m项和)先列出递推式：S(n+1,m)=2*(n,m)-C(n,m);S(n-1,m)=S(n,m)+C(n-1,m);S(n,m+1)=
LLL_yx·2020-07-31 14:26

Harvest of Apples（分块打表）

一般来讲这种询问100000次，每次线性递推100000的题目都可以用分块/莫队来解决引用下官方题解：其实不用莫队那么麻烦，直接nsqrt分块，然后暴力，具体看程序然后如何O(1)求组合数可以看：https://blog.csdn.net/jaihk662/article/details/52251561#include#include#include#include#include#includ
Jaihk662·2020-07-31 14:56

hdu 6333 Harvest of Apples 分块大法好，

Therearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsistsofonelinewithtwoi
zstu_zy·2020-07-31 13:57

HDU 6333 2018HDU多校赛 第四场 Harvest of Apples（莫队算法+组合数学）

ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):989AcceptedSubmission(s):377ProblemDescriptionTherearenapplesonatree,numberedfrom1to
alpc_qleonardo·2020-07-31 12:25

Harvest of Apples

问题B:ProblemB.HarvestofApples时间限制:5Sec内存限制:256MB提交:3解决:3[提交][状态][讨论版][命题人:admin]题目描述/upload/file/20180801/20180801122228_53314.pdfTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmos
Sher杨·2020-07-31 12:16

Harvest of Apples (分块思想)

TimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):2944AcceptedSubmission(s):1143ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofways
sizaif·2020-07-31 12:10

Harvest of Apples

http://acm.hdu.edu.cn/showproblem.php?pid=6333四个while的顺序不能变，不知道为什么#includeusingnamespacestd;typedeflonglongll;constintmod=1e9+7;constintN=1e5+10;llblock;llfac[N],inv[N];llL,R,now;llans[N];llrev2;llqpo
愈努力俞幸运·2020-07-31 12:23

Harvest of Apples

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
qq_36424540·2020-07-31 12:51

HDU 6333&&18多校4B Harvest of Apples 【分块+数学】

HDU6333ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):454AcceptedSubmission(s):149ProblemDescriptionTherearenapplesonatree,numbered
wust_wangzhi·2020-07-31 12:26

HDU - 6333 Harvest of Apples 分块暴力查询 莫队

ProblemDescriptionTherearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eachtestcaseconsist
lifelikes·2020-07-31 12:38

Harvest of Apples(莫队算法)

题目描述：给出T组n和m（1n)return0;returnF[n]*1ll*Finv[n-m]%mod*Finv[m]%mod;}AC代码：#include#definelllonglongusingnamespacestd;constintINF=0x3f3f3f3f;constintN=1e5+7;//复杂度O(n)constllmod=1e9+7;intF[N],Finv[N],inv[N
心照不必宣·2020-07-31 12:31

Harvest of Apples（莫队

思路：S[i][j]=S[i-1][j]+S[i-1][j-1]（递推到每一项和求和都满足这个公式)S[i-1][j-1]=S[i-1][j]-C[i-1][j]所以S[i][j]=2*S[i-1][j]-C[i-1][j]同理可推出余下的公式S(l,r)=S(l,r-1)+C(l,r)S(l,r)=2*S(l-1,r)-C(l-1,r);S(l,r)=S(l,r+1)-C(l,r+1)S(l,r
城南的花·2020-07-31 11:50

Harvest of Apples HDU - 6333(莫队算法+组合数)

ProblemB.HarvestofApplesHDU-6333Therearenapplesonatree,numberedfrom1ton.Countthenumberofwaystopickatmostmapples.InputThefirstlineoftheinputcontainsanintegerT(1≤T≤105)denotingthenumberoftestcases.Eacht
Guuuuuu老师儿·2020-07-31 11:35

Harvest of Apples（分块思想）

ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):2177AcceptedSubmission(s):847ProblemDescriptionTherearenapplesonatree,numberedfrom1t
七月初七小柠七·2020-07-31 11:54

Harvest of Apples

题意：一颗树上有n个苹果，求取不大于k个苹果的方案数。输入：T个案例，输入n,m，n,m>=1,a=1ll*a*a%MOD)if(b&1)c=1ll*c*a%MOD;returnc;}intC(inta,intb){return1ll*fac[a]*inv[b]%MOD*inv[a-b]%MOD;}intn,m;structnode{intn,m,id;}q[100005];intcmp(node
Tchitanda·2020-07-31 11:44

Harvest of Apples 莫队算法+乘法逆元

HDU6333ProblemB.HarvestofApples莫队算法求(0,n)~(m,n)组合数之和#includeusingnamespacestd;constintMAX=1e5+5;constintBLOCK=(int)sqrt(1e5);constlonglongMOD=1e9+7;longlongfact[MAX],inv[MAX];structask{intn,m,id,block
qianyri·2020-07-31 11:13

Harvest of Apples 莫队算法

BS(n,m)=S(n,m-1)+C(n,m)S(n,m)=2*S(n-1,m)-C(n-1,m)这个式子可由杨辉三角得出：上面一行的相邻两个元素相加得下面的元素，那么下面元素的和就是上面一行和的2倍减去上一行最后一个元素，因为它对下面一行只贡献了一次。由上两个式子可得：S(n,m)=S(n,m+1)+C(n,m+1)S(n+1,m)=2*S(n,m)-C(n,m)那么知道S(n,m)，并且预处理
Dave_L·2020-07-31 11:23

Harvest of Apples (莫队 + 组合数 + 逆元)

ProblemB.HarvestofApplesTimeLimit:4000/2000MS(Java/Others)MemoryLimit:262144/262144K(Java/Others)TotalSubmission(s):1595AcceptedSubmission(s):603ProblemDescriptionTherearenapplesonatree,numberedfrom1t
ZXM_ZhanX·2020-07-31 11:13

2019河北省大学生程序设计竞赛（重现赛）F.Take Apples（博弈论）

题目链接：https://ac.nowcoder.com/acm/contest/903/F解题心得：很坑的是输入顺序是m,n,sm,n,sm,n,s但是输入写的是s,m,ns,m,ns,m,n。推了半天发现BobBobBob只有一种情况下会赢，mmm是(s+1)(s+1)(s+1)的倍数，并且n<=sn<=snusingnamespacestd;constintmaxn=1e6+10
GoldenFingers·2020-07-29 13:09
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