HUST-1010

#include<stdio.h>
#include<string.h>
#define max 1000005
char s[max];
int len;
int next[max];
int sum;
void get_next()
{
int i=0;
int 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)!=EOF)
{
memset(next,0,sizeof(next));
sum=0;
len=strlen(s);
get_next();
printf("%d\n",len-next[len]);
}
return 0;
}