poj2406 Power Strings

#include <cstdio>
#include <cmath>
#include <queue>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;

char s[1000010];
int nextt[1000010];

int main()
{
    while (scanf("%s", s + 1) != 0)
    {
        if (s[1] == '.')
            break;
        nextt[0] = 0;
        int j = 0, len = strlen(s + 1);
        for (int i = 2; i <= len; i++)
        {
            while (j && s[j + 1] != s[i])
                j = nextt[j];
            if (s[j + 1] == s[i])
                j++;
            nextt[i] = j;
        }
        int t = len - nextt[len];
        if (len % t == 0)
            printf("%d\n", len / t);
        else
            printf("%d\n", 1);
    }

    return 0;
}