#include<iostream>
using namespace std;
long square[10001];
int main()
{
register long d,i,k,lim,num,rev,div;
//freopen("in.txt","r",stdin);
for(i=0;i<=10000;i++)
square[i]=i*i;
while(scanf("%ld",&d)==1)
{
switch(d)
{
case 2:lim=99;div=10;break;
case 4:lim=9999;div=100;break;
case 6:lim=999999;div=1000;break;
case 8:lim=99999999;div=10000;break;
}
for(i=0;square[i]<=lim;i++)
{
num=square[i]/div;
rev=square[i]%div;
k=num+rev;
cout.width(d);
cout.fill('0');
if(k*k==square[i])
cout<<square[i]<<endl;
}
}
return 0;
}
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