POJ2406 Power Strings

POJ2406


#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
const int maxn=1000010;
char b[maxn];
int next[maxn];
void prekmp()
{
    int j=-1;next[0]=-1;
    for(int i=1;b[i];++i)
    {
        while(j!=-1&&b[i]!=b[j+1]) j=next[j];
        if(b[i]==b[j+1]) j++;
        next[i]=j;
    }
}
int main()
{
    while(scanf("%s",b)!=EOF)
    {
        if(b[0]=='.') break;
        prekmp();
        int len=strlen(b);
        next[len-1]++;
        if(len%(len-next[len-1])==0)
            printf("%d\n",len/(len-next[len-1]));
        else printf("1\n");
    }
    return 0;
}