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RSS订阅原创 Codeforces 754 D Fedor and coupons
D. Fedor and couponstime limit per test4 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputAll our characters have hobbies. The s
2017-01-07 11:32:27
902
原创 codeforces 743 D. Chloe and pleasant prizes(DFS)
D. Chloe and pleasant prizestime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputGenerous sponsors of the olymp
2016-12-15 14:04:13
653
原创 codeforces 743 C. Vladik and fractions(构造)
C. Vladik and fractionstime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputVladik and Chloe decided to determin
2016-12-15 14:00:03
728
原创 codeforces 743 B Chloe and the sequence(递归)
B. Chloe and the sequencetime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputChloe, the same as Vladik, is a co
2016-12-15 13:56:35
449
原创 codeforces 743 A Vladik and flights(水题)
A. Vladik and flightstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputVladik is a competitive programmer. T
2016-12-15 13:54:41
561
原创 HDU5880 Family View（AC自动机）
链接：http://acm.hdu.edu.cn/showproblem.php?pid=5880题意：给定N个串，一个长文本，把那N个串在长文本里出现的部分用×代替。思路：把N个串放到AC自动机上然后在结点标记上串长，接着把长文本放到自动机上去匹配，匹配到了就替换掉。至于替换的方法，不用暴力的去修改，只要同类似括号匹配的方式打上标记就好了。要注意2种情况的处理1： N个串种有
2016-10-10 18:30:36
480
原创 HDU 5573 Binary Tree 构造
链接：http://acm.hdu.edu.cn/showproblem.php?pid=5573思路：首先，我们要知道，用1,2,4,...2^(n-1)能构造出所有的1~2^n-1的数，所以我们一直走最左边的路就好了,当然,根据奇偶性要在最后一步调整下.然后我们在第i层选正负怎么办呢,我们就假设是正的,那么我们就要用1,2...2^(i-1)构造出n-2^i,如果构造不出来，那就取负的
2016-10-05 17:28:16
376
原创 HDU5556 Land of Farms 最大独立集
链接：http://acm.hdu.edu.cn/showproblem.php?pid=5556思路:直接枚举祖先的选不选,然后把选上的附近的删掉,然后剩下的点按做最大独立集.祖先那边选了x个,剩下的没被删掉的点共n个,把x+y是奇数的放一边,偶数的放另一边,匹配数是m,那么结果就是x+n-m。代码：#include #include #include #inclu
2016-10-05 17:22:25
407
原创 codeforces 709 D Recover the String (构造)
D. Recover the Stringtime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputFor each string s consisting of charac
2016-09-06 17:09:53
683
原创 CodeForces 369 div2 E. ZS and The Birthday Paradox 数论
E. ZS and The Birthday Paradoxtime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputZS the Coder has recently fo
2016-08-30 18:52:14
621
原创 CodeForces 369 div2 D Directed Roads 图论 数论
D. Directed Roadstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputZS the Coder and Chris the Baboon has exp
2016-08-30 18:50:59
491
原创 CodeForces 369 div2 C Coloring Trees DP
C. Coloring Treestime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputZS the Coder and Chris the Baboon has arr
2016-08-30 00:47:51
554
原创 CodeForces 367E Working routine 十字链表
E. Working routinetime limit per test2.5 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputVasiliy finally got to work, where the
2016-08-12 22:45:10
994
原创 CodeForces 367D Vasiliy's Multiset Trie树
D. Vasiliy's Multisettime limit per test4 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputAuthor has gone out of the stories ab
2016-08-12 22:36:52
538
原创 CodeForces 367C Hard problem DP
C. Hard problemtime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputVasiliy is fond of solving different tasks.
2016-08-12 22:33:40
744
原创 HDU5794 A Simple Chess
A Simple ChessTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2015 Accepted Submission(s): 545Problem DescriptionThere is a n
2016-08-11 23:14:59
574
原创 HDU5831 Rikka with Parenthesis II
Rikka with Parenthesis IITime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 60 Accepted Submission(s): 48Problem DescriptionAs w
2016-08-11 19:07:37
595
原创 HDU5826 physics
physicsTime Limit: 6000/3000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 54 Accepted Submission(s): 36Problem DescriptionThere are n balls on a
2016-08-11 18:58:05
367
原创 POJ087 A Plug for UNIX (最大流)
A Plug for UNIXTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 15962 Accepted: 5464DescriptionYou are in charge of setting up the press room for the i
2016-07-31 14:55:01
347
原创 HDU5270Wool (区间扫描)
WoolTime Limit: 8000/4000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 918 Accepted Submission(s): 270Problem DescriptionAt dawn, Venus sets a
2016-07-29 13:09:37
553
原创 CF363Ddiv2 D Fix a Tree
晚上写残了，来补一下。D. Fix a Treetime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputA tree is an undir
2016-07-20 10:05:47
529
原创 树状DP
今天我们来学一下树状DP树状DP 一听就明白，树上的DP，父亲的状态要根据儿子的状态来确定，而树这种东西呢，一般DFS一遍就可以了。先来两个题吧。Anniversary partyTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 6456 Accepted:
2016-07-19 20:35:36
2653
原创 HDU1026 Ignatius and the Princess I(优先队列+BFS)
Ignatius and the Princess ITime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 16500 Accepted Submission(s): 5248Special JudgeProblem
2016-06-04 00:24:23
404
原创 POJ3660 Cow Contest (传递闭包)
Cow ContestTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 9308 Accepted: 5240DescriptionN (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are partici
2016-05-20 12:43:33
573
原创 HDU2067小兔的棋盘
小兔的棋盘Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8981 Accepted Submission(s): 4662Problem Description小兔的叔叔从外面旅游回来给她带来了一个礼
2016-05-19 23:44:23
1017
原创 [LeetCODE] Best Time to Buy and Sell Stock I II III IV V
I:Say you have an array for which the ith element is the price of a given stock on day i.If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the s
2016-05-15 20:46:50
390
原创 2016百度之星资格赛
Problem A Accepts: 1662 Submissions: 11595 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Problem Description度熊手上有一本字典存储了大量的单词，有一次，他
2016-05-15 20:22:07
2430
原创 HDU1024 Max Sum Plus Plus
Max Sum Plus PlusTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 24256 Accepted Submission(s): 8313Problem DescriptionNow I t
2016-05-13 15:27:23
336
原创 Recycling Bottles
Recycling Bottlestime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputIt was recycling day in Kekoland. To cele
2016-05-12 15:03:00
660
原创 How many primes
How many primesTime Limit:1000MS Memory Limit:65536KTotal Submit:396 Accepted:15DescriptionA prime number (or a prime) is a natural number greater than 1 that has no positive divisors other t
2016-04-26 15:53:19
682
原创 Piece of Cake
Piece of CakeTime Limit:1000MS Memory Limit:65536KTotal Submit:69 Accepted:13DescriptionThe annual neonatal trials will start next week, at the same time, all old guys of the ACM teams want t
2016-04-26 13:33:56
868
原创 Juju's lessons
Juju's lessonsTime Limit:1000MS Memory Limit:65536KTotal Submit:209 Accepted:40DescriptionJuju is a child who enjoys learning. she has two majors and many courses have time conflict.As a chil
2016-04-26 13:25:25
560
原创 Ranking Problem
Ranking ProblemTime Limit:1000MS Memory Limit:65536KTotal Submit:80 Accepted:14DescriptionIf you are a LOLer, then you must be very familiar with LPL league. In the spring of 2016 LPL league
2016-04-26 13:16:49
956
原创 Alpha and Beta
Alpha and BetaTime Limit:1000MS Memory Limit:65536KTotal Submit:491 Accepted:62DescriptionAlpha and Beta are best friends and make company with each other all the time. There is a time when
2016-04-26 13:09:20
696
原创 Ctrl + H
Ctrl + HTime Limit:1000MS Memory Limit:65536KTotal Submit:345 Accepted:84DescriptionAs we know, ’Ctrl + H’ is shortcut key of ‘replace’. In the problem, we define the ‘replace’ as replacing o
2016-04-26 13:00:04
493
原创 Yeahpeng's inequality
Yeahpeng's inequalityTime Limit:3000MS Memory Limit:65536KTotal Submit:35 Accepted:5DescriptionYeahpeng is not good at inequality. Unfortunately, there are many inequalities in his homework a
2016-04-26 12:56:01
478
原创 HDU Labyrinth DP
LabyrinthTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 701 Accepted Submission(s): 316Problem Description度度熊是一只喜欢探险的熊，一次偶然落
2016-04-19 18:59:29
506
原创 UESTC 1137 邱老师选妹子
邱老师选妹子Time Limit: 3000/1000MS (Java/Others) Memory Limit: 65535/65535KB (Java/Others)Submit Status邱老师长得帅这是人尽皆知，于是追他的妹子就会很多。但是你知道，邱老师是一个很专一的人，所以他心里面只能有一个人。于是他决定从追他的众多妹子里挑选
2016-04-15 11:05:19
546
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