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Re:水平不够,,,,w了特别久

Posted by leiyongZL at 2016-07-25 16:15:34 on Problem 2406
In Reply To:水平不够,,,,w了特别久 Posted by:leiyongZL at 2016-07-25 16:14:48
#include <iostream>
#include<string.h>
#include<stdio.h>
using namespace std;
int next[10000005];
void getnext(char *S,int& R)
{
    int j=0;
    next[0]=0;
    for(int i=1; S[i]!='\0'; i++)
    {

        while(j>0&&S[i]!=S[j])
        {
            j=next[j-1];
        }
        if(S[i]==S[j])
        {
            j++;
        }
        next[i]=j;
    }
}
int main()
{
    char S[1000005];
    while(scanf("%s",S)&&S[0]!='.')
    {
        memset(next,0,sizeof(next));
        int R=0;
        getnext(S,R);
        int l=strlen(S);
        int j=next[l-1];
        int m=l-j,k=j,B;
        while(j>0)
        {
            if(j==m)
            {
                B=1;
                break;
            }
            j=next[j-1];
            int n=k-j;
            if(n!=m)
            {
                B=0;
                break;
            }
            k=j;
        }
        //cout<<m<<endl;
        if(B)
            cout<<l/(m)<<endl;
        else
            cout<<"1"<<endl;
    }
    return 0;
}

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