Power Strings----poj2406(kmp扩展 循环节)

#include<stdio.h>
#include<iostream>
#include<algorithm>
#include<string.h>
using namespace std;

#define N 1000010

char s
;
int Next
, n;

void Getnext()
{
int i = 0, j = -1;
Next[0] = -1;
while(i<n)
{
if(j==-1 || s[i] == s[j])
Next[++i] = ++j;
else
j=Next[j];
}
}

int main()
{
while(scanf("%s", s),s[0]!='.')
{
n = strlen(s);

Getnext();

int ans = n-Next
;

if(n%ans!=0)
ans = 1;
else
ans = n/ans;
printf("%d\n", ans);
}
return 0;
}
/*
aabaabaa
1
*/