hdu1358

#include <stdio.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <exception>
#include <cstring>
#include <stdlib.h>
using namespace std;
const int Len=1000000;
int next[Len+5];
void getNext(int next[],char str[])
{
    int len=strlen(str);
    int i=0,j=-1;
    while(i<len)
    {
        if((j==-1)||(str[i]==str[j]))
        {
            j++;
            i++;
            next[i]=j;
        }
        else j=next[j];
    }
    
    
    return;
}
void print(int next[],int len)
{
    for(int i=0;i<len;i++)
        printf("%d ",next[i]);
}
int cmp(char s1[],char s2[])
{
    int i=0,j=0;//i->s1,j->s2
    int len1=strlen(s1),len2=strlen(s2);
    int times=0;
    while(i<len1)
    {
        if((j==-1)||(s1[i]==s2[j]))
        {
            i++;
            j++;
            if(j>=len2) 
            {
                j=0;
                times++;
            }
        }
        else j=next[j];
    }
    return times;
}
int main(int argc, char **argv)
{
    int n,id=0;
    char str1[Len+5];
    memset(next,0,sizeof(next));
    next[0]=-1;
    while(scanf("%d",&n)==1)
    {
        if(n==0) break;
        id++;
        scanf("%s",str1);
        int len1=strlen(str1);
        
        str1[len1]='.';
        str1[len1+1]='\0';
        
        getNext(next,str1);
         len1=strlen(str1);
        //print(next,len1);
        //cout<<endl;
        printf("Test case #%d\n",id);
        for(int i=2;i<len1;i++)
        {
        if(i%(i-next[i])==0)
        {
            if(i/(i-next[i])>1)
            printf("%d %d\n",i,i/(i-next[i]));
        }
        }
        
        cout<<endl;
    }
    return 0;
}