POJ 2406 KMP

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
const int MAXN=1e6+5;
int next[MAXN];
char s[MAXN];
void get_next(char* s){
int len=strlen(s);
int i=0,j=-1;
next[0]=-1;
while(i<len){
if(j==-1||s[i]==s[j]){
i++;
j++;
next[i]=j;
}
else {
j=next[j];
}
}
}
int main()
{
while(~scanf("%s",s)){
if(strcmp(s,".")==0)break;
get_next(s);
int len=strlen(s);
if(len%(len-next[len])==0){
printf("%d\n",len/(len-next[len]));
}
else {
printf("1\n");
}
}
return 0;
}