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Substrings
后缀自动机——
Substrings
题解:让我们找长度为x的子串出现的最大次数。我们先建立sam,然后把节点top序。我们知道endpos是一些出现相同次数和相同结束位置的集合。所以我们定义fif_ifi为长度为i的子串出现的最大次数。我们因为知道长度fi>=fjf_i>=f_jfi>=fj,iusingnamespacestd;constintmaxn=2e5+5e4+10;constintmaxc=27;typedeflongl
行走天涯的豆沙包
·
2020-07-28 21:27
后缀自动机
Educational Codeforces Round 72 C.The Number Of Good
Substrings
题目描述Youaregivenabinarystrings(recallthatastringisbinaryifeachcharacteriseither0or1).Letf(t)bethedecimalrepresentationofintegertwritteninbinaryform(possiblywithleadingzeroes).Forexamplef(011)=3,f(00101
li_wen_zhuo
·
2020-07-28 01:22
Codeforces
Palindromic
Substrings
Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Example1:Input:"
huanghanqian
·
2020-07-16 00:05
leetcode
leetcode
Number of
Substrings
With Only 1s
Givenabinarystrings(astringconsistingonlyof'0'and'1's).Returnthenumberofsubstringswithallcharacters1's.Sincetheanswermaybetoolarge,returnitmodulo10^9+7.Example1:Input:s="0110111"Output:9Explanation:Th
Schwifty
·
2020-07-13 06:00
Many Equal
Substrings
http://codeforces.com/contest/1029/problem/A嗳,简单的题做起来是真的舒服qwq1publicstaticvoidmain(String[]args){2Scannerio=newScanner(System.in);3intn=io.nextInt(),k=io.nextInt();4Stringstr=io.nextLine();5while(str.
dodo_o
·
2020-07-11 19:10
HDU -1238
Substrings
(暴力枚举每个子串)
SubstringsTimeLimit:2000/1000MS(Java/Others)MemoryLimit:65536/32768K(Java/Others)ProblemDescriptionYouaregivenanumberofcase-sensitivestringsofalphabeticcharacters,findthelargeststringX,suchthateitherX
名字太长容易被发现并打死
·
2020-07-10 11:32
2018暑假ACM集训
#
ACM_字符串
lintcode 具有K个不同字符的子串
lintcode具有K个不同字符的子串描述样例思考代码描述给定字符串S和整数K.计算长度为K且包含K个不同字符的子串数样例String:“abcabc”K:3Answer:3
substrings
:[“abc
锤某
·
2020-07-10 00:35
每日一练
C++
CF914F
Substrings
in a String
题面英文题面题意:给一个串\(S\),有\(q\)次操作:1ic表示将\(i\)位置的字符修改为\(c\);2lrt表示求\(s_{l},s_{l+1},\cdotss_r\)中\(t\)串的出现次数。\(|S|,q,\sum|t|\leq10^5\)。题解:不难想到暴力kmp匹配,单次查询的时间复杂度是\(O(|S|+|t|)\)。发现\(|t|\)较小时这样做很不划算,因此我们可以考虑根号分治
Purple_wzy
·
2020-07-09 07:00
Palindromic
Substrings
(找出字符串中所有的回文子串)
Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Example1:Input:"
菜鸟Octopus
·
2020-07-09 06:39
LeetCode
1639。具有K个不同字符的子串
给定字符串S和整数K.计算长度为K且包含K个不同字符的子串数样例String:"abcabc"K:3Answer:3
substrings
:["abc","bca","cab"]String:"abacab"K
qq_41017546
·
2020-07-08 01:36
LeetCode
Palindromic
Substrings
&& 5. Longest Palindromic Substring
题目:Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Example1:Inpu
liuchongee
·
2020-07-07 14:23
leetcode刷题
回文子串(Palindromic
Substrings
)
Leetcode之动态规划(DP)专题-647.回文子串(PalindromicSubstrings)给定一个字符串,你的任务是计算这个字符串中有多少个回文子串。具有不同开始位置或结束位置的子串,即使是由相同的字符组成,也会被计为是不同的子串。示例1:输入:"abc"输出:3解释:三个回文子串:"a","b","c".示例2:输入:"aaa"输出:6说明:6个回文子串:"a","a","a","a
denghan1065
·
2020-07-07 06:31
Palindromic
Substrings
DescriptionGivenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Examp
Nancyberry
·
2020-07-06 09:43
Many Equal
Substrings
-(KMP)-Codeforces Round #506 (Div. 3) A题
思路:利用KMP算法中的next数组,求循环节。具体过程看代码。ACcode:#include#include#include#include#includeusingnamespacestd;constintmaxn=1e5+10;intnex[maxn];stringstr1,str2;intn=0,k=0;intans=0;voidmake_nex(){intj=0,k=-1;nex[0]=
Mavis code
·
2020-07-05 02:08
CodeForces
KMP
LeetCode 1358. 包含所有三种字符的子字符串数目
https://leetcode-cn.com/problems/number-of-
substrings
-containing-all-three-characters/使用双指针,维护一个刚好满足条件的段
qq789045
·
2020-07-02 15:40
LeetCode
Rotating
Substrings
字符串匹配DP
字符串匹配DP一般形式:dp[i][j],s前i个字符,匹配t前j个字符,花费的最小代价。对于这一题。先观察操作:[l,r]区间往后移不好处理,转化为把s[r]移动到s[l]的前面.经过多次操作,最终使得s与t相等。显然每次操作是为了调整后缀,使得s,t的后缀相同。为了方便,我们先把s,t字符串翻转。操作变成了把一个字符往后移动。([l,r]操作表示:先删去s[l],再插入到r后中)dp[i][j
夕林山寸
·
2020-07-01 18:03
CF
动态规划----字符串DP
The Number Of Good
Substrings
(思维)
Youaregivenabinarystrings(recallthatastringisbinaryifeachcharacteriseither0or1).Letf(t)bethedecimalrepresentationofintegertwritteninbinaryform(possiblywithleadingzeroes).Forexamplef(011)=3,f(00101)=5,
LSC__lsc
·
2020-07-01 11:20
思维
Rotating
Substrings
(dp)
F.RotatingSubstrings(dp)思路:dpdpdp,找到最大匹配数然后用nnn去减,因为每个字母最多动一次就行了。设dp[i][j]dp[i][j]dp[i][j]为SSS串中前iii个字符和TTT串中前jjj个字符的最大匹配。转移状态时注意因为每次操作字符往左移动,所以必须满足i≤ji\leqji≤j,不然永远匹配不了。转移方程:{dp[i+1][j]=max(dp[i+1][j
Harris-H
·
2020-07-01 06:02
DP
计算字符串中回文子串的个数 Palindromic
Substrings
为什么80%的码农都做不了架构师?>>>问题:Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamechar
helloxielan
·
2020-06-28 04:01
HDU-1238
Substrings
stl的运用
ProblemDescription:Youaregivenanumberofcase-sensitivestringsofalphabeticcharacters,findthelargeststringX,suchthateitherX,oritsinversecanbefoundasasubstringofanyofthegivenstrings.InputThefirstlineofthe
DATELOST
·
2020-06-27 08:48
hdu
ACM_搜索
2019牛客国庆集训派对day1 C Distinct
Substrings
题意:https://ac.nowcoder.com/acm/contest/1099/C。分析:大致题意是说向字符串末尾添加任意字符所增加的不同子串个数。容易知道,新增的子串一定是后缀,如果新增字符没有出现过,那么贡献n+1,n为字符串的长度,如果出现过了,容易发现如果这个字符的前一个位置的的前缀的后缀和原串的后缀部分相同,那么肯定有重复的,重复的个数就是两个前缀的最长公共后缀长度+1(因为包括
Self-Discipline
·
2020-06-26 19:03
LeetCode647——回文子串
我的LeetCode代码仓:https://github.com/617076674/LeetCode原题链接:https://leetcode-cn.com/problems/palindromic-
substrings
清風逐尘乀
·
2020-06-25 19:44
LeetCode题解
「算法」LeetCode 696. 计数二进制子串(JavaScript版)
题目链接:https://leetcode-cn.com/problems/count-binary-
substrings
/这道题目前我有两种解题思路,如果别的小伙伴还有更好的思路或是觉得我的思路不正确
Jack_WJQ
·
2020-06-25 02:48
#
LeetCode刷题记录
Count Binary
Substrings
从今天开始刷字符串部分的题目,这部分我会记录每一题的简短思路,方便最后写一个总结性的博客。接下来先看一下第一道题696.CountBinarySubstrings:题目:Giveastrings,countthenumberofnon-empty(contiguous)substringsthathavethesamenumberof0'sand1's,andallthe0'sandallthe1
liuchongee
·
2020-06-24 06:50
leetcode刷题
Palindromic
Substrings
【重要】推特OA
如果死套以前backtrack的公式这题会死的很惨,因为这个不是求组合而是求substring。也就是长度可以为1,为2,为...最好画图看:尽管这题和Allpossiblepalindrome很像,但是很不一样!我们这里backtrack的forloop意思是:假设从第i个起点开始当substring的头,能够产生的所有substring为什么。比如以0为起点,可以产出,a,aa,aab.如果以
98Future
·
2020-06-22 07:12
Count Binary
Substrings
(easy)
LeetCode刷题记录6——696.CountBinarySubstrings(easy)目录LeetCode刷题记录6——696.CountBinarySubstrings(easy)题目语言思路后记题目题目给定一个只包含0、1的字符串,要你算出这个字符串中,相同个数的0、相同个数的1组成的连续的子字符串有多少个,比如给定00110011,那么从头开始算:0011算一个,因为0连续出现了2次而
jmuyjl
·
2020-06-21 23:11
LeetCode
环绕字符串中的唯一子字符串
传送门:https://leetcode-cn.com/problems/unique-
substrings
-in-wraparound-string/十分好的题目!
塔子哥来了嗷
·
2020-05-23 12:57
JavaScript 算法 计数二进制子串
来源:力扣(LeetCode)链接:https://leetcode-cn.com/problems/count-binary-
substrings
示例:输入:"00110011"输出:6解释:有6个子串具有相同数量的连续
阿畅_
·
2020-04-22 22:56
Palindromic
Substrings
Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.求所有回文子序列的个数Examp
冷殇弦
·
2020-03-26 03:53
Palindromic
Substrings
Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Example1:Input:"
persistent100
·
2020-03-03 07:44
Palindromic
Substrings
回文子串
Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.给定一字符串,统计其含有的回文子
这就是一个随意的名字
·
2020-03-03 04:01
Palindromic
Substrings
Givenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Example1:Input:"
Jeanz
·
2020-03-01 06:08
Unique
Substrings
in Wraparound String
Considerthestringstobetheinfinitewraparoundstringof"abcdefghijklmnopqrstuvwxyz",soswilllooklikethis:"...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....".Nowwehaveanotherstringp.Yourjobis
帽子和五朵玫瑰
·
2020-02-28 09:16
Palindromic
Substrings
MediumGivenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstringseventheyconsistofsamecharacters.Example1:I
greatfulltime
·
2020-02-17 19:32
72 - string
substrings
, swapping, and finding
#include#includeusingnamespacestd;intmain(){strings1("omgithinkiamppreggy!");cout<
社交帐号直接注册
·
2020-02-16 13:48
Palindromic
Substrings
最大回文串正好让我回顾一下DP,动态规划比较经典的题目Output:3Explanation:Threepalindromicstrings:"a","b","c".Input:"aaa"Output:6Explanation:Sixpalindromicstrings:"a","a","a","aa","aa","aaa".总之就是一个线性规划的问题,注意递归条件:if(s[start]=s[e
腹黑君
·
2020-02-16 11:51
【题解】Asterisk
Substrings
Codeforces 1276F 后缀自动机 树链的并
第一道独立解决的Div1F,嘿嘿,幸好没看题解把串分为以下几类不包含star的串太简单,略star在最前面的串略star在最后面的串略单独一个star答案++单独一个空串答案++star在中间的串注意到,假设star的位置是pos,实际上相当于选择一个右端点为pos-1的串s1,再选择一个左端点为pos+1的串s2,问这样的pair(s1,s2)有多少个也就是选两个原串的子串,并且这两个子串要满足
mlystdcall
·
2020-02-16 01:00
Count Binary
Substrings
问题(Easy):Giveastrings,countthenumberofnon-empty(contiguous)substringsthathavethesamenumberof0'sand1's,andallthe0'sandallthe1'sinthesesubstringsaregroupedconsecutively.Substringsthatoccurmultipletimesa
Cloudox_
·
2020-02-05 01:50
不同的循环子字符串 | Distinct Echo
Substrings
★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★➤微信公众号:山青咏芝(let_us_code)➤博主域名:https://www.zengqiang.org➤GitHub地址:https://github.com/strengthen/LeetCode➤原文地址:https://www.cnblogs.com/strengthen/p/12185573.html➤
山青咏芝
·
2020-01-13 08:00
Palindromic
Substrings
这道题是给你一个字符串,记录里面所有的回文字符串的个数。例如'abc'output=3.分别为‘a’,‘b’,‘c’,而'aaa'.output=6分别为'a','a','a','aa','aa','aaa'思路:我当时想到用dp,但没有想到怎么遍历。可以i从头往后遍历,然后j从头遍历到i,这样中间都是之前计算过的。然后cnt每次遇到dp[i][j]为1就加1.python代码:classSolu
woniudear
·
2019-12-13 02:32
Find K-Length
Substrings
With No Repeated Characters
原题链接在这里:https://leetcode.com/problems/find-k-length-
substrings
-with-no-repeated-characters/题目:GivenastringS
Dylan_Java_NYC
·
2019-12-04 08:00
Palindromic
Substrings
原题地址https://leetcode.com/problems/palindromic-
substrings
/description/题意找出所有的回文子串(substring)思路naive的解法
岛上痴汉
·
2019-12-01 14:17
Unique
Substrings
in Wraparound String
题目Considerthestringstobetheinfinitewraparoundstringof"abcdefghijklmnopqrstuvwxyz",soswilllooklikethis:"...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....".Nowwehaveanotherstringp.Yourjob
yxwithu
·
2019-11-05 21:40
Palindromic
Substrings
PalindromicSubstringspublicintcountSubstrings(Strings){intcount=0;intlength=s.length();for(inti=0;i=0&&right<str.length()&&str.charAt(left)==str.charAt(right)){count++;left--;right++;}return;}
Jarhot
·
2019-11-04 02:52
2019 牛客国庆集训派对day1-C Distinct
Substrings
(exkmp+概率)
链接:https://ac.nowcoder.com/acm/contest/1099/C来源:牛客网时间限制:C/C++1秒,其他语言2秒空间限制:C/C++32768K,其他语言65536KSpecialJudge,64bitIOFormat:%lld题目描述输入描述:输出描述:Foreachtestcase,printanintegerwhichdenotestheresult.示例1输入复
StarHai
·
2019-10-09 21:00
Unique
Substrings
in Wraparound String
题目要求Considerthestringstobetheinfinitewraparoundstringof"abcdefghijklmnopqrstuvwxyz",soswilllooklikethis:"...zabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd....".Nowwehaveanotherstringp.Yourj
raledong
·
2019-10-05 00:00
java
leetcode
Get Equal
Substrings
Within Budget
题目如下:Youaregiventwostringssandtofthesamelength.Youwanttochangestot.Changingthei-thcharacterofstoi-thcharacteroftcosts|s[i]-t[i]|thatis,theabsolutedifferencebetweentheASCIIvaluesofthecharacters.Youarea
seyjs
·
2019-10-02 06:00
【题解】2019牛客国庆集训派对day1 C Distinct
Substrings
Z函数
题目来源:2019湖南省省赛C题现在有一个长为n(1e6)、字符集为m(1e6)的字符串S,对于一个字符c定义h(c)=Sc的不同子串个数−S的不同子串个数h(c)=Sc的不同子串个数-S的不同子串个数h(c)=Sc的不同子串个数−S的不同子串个数,即在尾部添加c后多了几个不同子串,求Σc=1mh(c)\Sigma_{c=1}^mh(c)Σc=1mh(c)。多组数据,Σn,Σmusingnames
Little_Fall
·
2019-10-01 15:51
题解
Leetcode: Palindromic
Substrings
647.PalindromicSubstringsMedium165685FavoriteShareGivenastring,yourtaskistocounthowmanypalindromicsubstringsinthisstring.Thesubstringswithdifferentstartindexesorendindexesarecountedasdifferentsubstrin
neverlandly
·
2019-09-30 13:00
Leetcode-5207 Get Equal
Substrings
Within Budget(尽可能使字符串相等)
1typedeflonglongll;2#define_for(i,a,b)for(inti=(a);ib;i--)4#defineINF0x3f3f3f3f5#definepbpush_back6#definemaxn1000078classSolution9{10public:11vectord;12intequalSubstring(strings,stringt,intmaxCost)13
Asurudo
·
2019-09-29 14:00
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