import java.util.stream.LongStream;
 
class SquareFinder {
	private static boolean isSixNum(long target){
		double sqrt=Math.sqrt(target);
		boolean ret=((long)((sqrt-(long)sqrt)*1000000))%111111==0;
		if(ret)System.out.println(target);
		return ret;
	}
 
	public static void main(String[] args) {
		LongStream.iterate(72,t->t+1)
		.anyMatch(x->
			LongStream.range(x*x+1,x*x+x*2).parallel()
			.filter(t->isSixNum(t))
			.findFirst().isPresent()
		);
	}
}