POJ 2406 Power Strings

#include <iostream>
#include <cstring>
#include <string>
#include <algorithm>
#include <cstdio>
#define MAXSIZE 1000100
using namespace std;

char a[MAXSIZE];
int Next[MAXSIZE];
int Len;

int GetNext()
{
    int i = 0, j = Next[0] = -1;
    while (i < Len)
    {
        if (j == -1 || a[i] == a[j])
            Next[++i] = ++j;
        else
            j = Next[j];
    }
}

int main(void)
{
    ios::sync_with_stdio(false);
    while (true)
    {
        cin >> a;
        if (a[0] == '.')
            return 0;
        Len = strlen(a);
        GetNext();
        int period = Len - Next[Len];
        if (Len % period == 0)
            cout << Len / period << endl;
        else
            cout << 1 << endl;
    }

    return 0;
}