public class four_2007_2014 {

private static boolean isSuitable(int num) {	int sqrt = (int)(Math.sqrt(num));	if(sqrt*sqrt == num) {		return true;	}	return false;}private static boolean isTwoOfSame(int num) {	int i = num / 100;				//百位	int j = (num/10) % 10;			//十位	int k = num % 10;	if(i == j && i != k) {		return true;	}else if(i == k && i != j) {		return true;	}else if(k == j && i != k) {		return true;	}			return false;}public static void main(String[] args) {	int num;	for(num = 100; num <= 999; ++num) {		if(isSuitable(num) && isTwoOfSame(num)){			System.out.println(num);		}	}}

}