{"id":276,"date":"2012-04-19T16:15:00","date_gmt":"2012-04-19T08:15:00","guid":{"rendered":"http:\/\/hymike.net\/blog\/?p=276"},"modified":"2012-04-19T16:15:00","modified_gmt":"2012-04-19T08:15:00","slug":"2012_campus_recruitment_-_request_string_longest_repeated_substring_problem","status":"publish","type":"post","link":"https:\/\/blog.hymike.net\/?p=276","title":{"rendered":"2012\u6821\u56ed\u62db\u8058–\u6c42\u5b57\u7b26\u4e32\u7684\u6700\u957f\u91cd\u590d\u5b50\u4e32\u95ee\u9898"},"content":{"rendered":"<\/p>\n

\u95ee\u9898\u6982\u8ff0\uff1a<\/span><\/p>\n

\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5982\u4f55\u6c42\u6700\u957f\u91cd\u590d\u51fa\u73b0\uff08\u81f3\u5c11\u51fa\u73b02\u6b21\uff09\u7684\u5b50\u5b57\u7b26\u4e32\u5462\uff1f\u6bd4\u5982\u8f93\u5165ttabcftrgabcd\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3aabc\uff0ccanffcancd\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3acan\uff1f<\/span><\/p>\n

<\/span><\/p>\n

http:\/\/hi.baidu.com\/zhang_daxia\/blog\/item\/c9ea38f24e3bf39eb801a040.html<\/a>\u4e2d\u95f4\u7ed9\u4e86\u4e00\u4e2a\u540e\u7f00\u6811\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u5176\u7b97\u6cd5\u590d\u6742\u5ea6\u662fO(n^2*log(n))\uff08\u56e0\u4e3a\u4e2d\u95f4\u7684qsort\u4e2d\u95f4\u7684strcmp\u7684\u590d\u6742\u5ea6\u4e5f\u662fO(n)\uff09\uff0c\u5b9e\u9645\u4e0a\u8fd9\u6837\u7684\u9898\u76ee\u6700\u591aO(n^2)\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\u679c\u501f\u9274KMP\u7684\u65b9\u6cd5\u5219\u53ef\u4ee5\u8fbe\u5230O(mn)\uff0c\u5176\u4e2dm\u662f\u6700\u957f\u91cd\u590d\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u4e0b\u9762\u662f\u6211\u7684\u7b97\u6cd5\uff0c\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u7c7b\u4f3c\u62c9\u94fe\u90a3\u6837\u9010\u4f4d\u6bd4\u8f83\u5c31\u884c\u4e86\uff0c\u6ce8\u610f\u5b57\u7b26\u4e32\u4e0d\u80fd\u91cd\u53e0\uff08\u6bd4\u5982ababa\uff0c\u5219\u6700\u5927\u91cd\u590d\u5219\u4e3aab\u800c\u4e0d\u662faba\uff09\u3002\u56e0\u4e3a\u5bf9KMP\u4e0d\u719f\u6089\uff0c\u6240\u4ee5\u5c31\u6ca1\u6709\u653e\u4e0aO(mn)\u7684\u7b97\u6cd5\u3002\u3002<\/p>\n

C++\u8bed\u8a00<\/u>: \u9ad8\u4eae\u4ee3\u7801\u7531\u53d1\u82bd\u7f51\u63d0\u4f9b<\/a><\/p>\n

#include <iostream><\/span><\/p>\n

#include <stdio.h><\/span>
#include <stdlib.h><\/span>
using<\/span> namespace<\/span> std;
#define LEN 1000<\/span>
void<\/span> work(char<\/span> *s)
{
    int<\/span> i,j;
    int<\/span> len=strlen(s);
    int<\/span> al,ar,bl,br;\/\/left right of the simistring<\/span>
    int<\/span> maxlen = 0<\/span>;
    char<\/span> maxstr[LEN];
    for<\/span>(i=0<\/span>;i<len;i++)
    {
        al = 0<\/span>; ar = 0<\/span>; bl = i; br = i;
        for<\/span>(j=i;j<=len;j++)
        {
            if<\/span>(ar-al>maxlen)
            {
                maxlen = ar-al;
                memset(maxstr,0<\/span>,LEN);
                strncpy(maxstr,&s[al],ar-al);
            }
            if<\/span>(j==len) break<\/span>;
            if<\/span>(s[j-i]==s[j])
            {
                ar++;
                br++;
                if<\/span>(bl>=ar)    continue<\/span>;
            }
            bl=br=j+1<\/span>;
            al=ar=j+1<\/span>-i;            
        }
    }
    cout << maxlen << " "<\/span> <<  maxstr << endl;
}
int<\/span> main()
{
    char<\/span> s[LEN];
    while<\/span>(cin>>s)
    {
        work(s);
    }
    return<\/span> 0<\/span>;
}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u95ee\u9898\u6982\u8ff0\uff1a \u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5982\u4f55\u6c42\u6700\u957f\u91cd\u590d\u51fa\u73b0\uff08\u81f3\u5c11\u51fa\u73b02\u6b21\uff09\u7684\u5b50\u5b57\u7b26\u4e32\u5462\uff1f\u6bd4\u5982\u8f93\u5165ttabcftrgabcd … \u7ee7\u7eed\u9605\u8bfb\u201c2012\u6821\u56ed\u62db\u8058–\u6c42\u5b57\u7b26\u4e32\u7684\u6700\u957f\u91cd\u590d\u5b50\u4e32\u95ee\u9898\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.hymike.net\/index.php?rest_route=\/wp\/v2\/posts\/276"}],"collection":[{"href":"https:\/\/blog.hymike.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hymike.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hymike.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hymike.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=276"}],"version-history":[{"count":0,"href":"https:\/\/blog.hymike.net\/index.php?rest_route=\/wp\/v2\/posts\/276\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.hymike.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hymike.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hymike.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}