JAVA basic programming exercises-13

Question: An integer, after adding 100 to it, it becomes a perfect square number, and adding 168 is another perfect square number. What is the number?

public class example1 {
	static boolean f(int n) {
		int m=(int) Math.sqrt(n);
		return m*m==n;
	}
	public static void main(String[] args) {
		for(int i=1;;i++) {
			if(f(i*i-168+100)) {
				System.out.println(i*i-168);
				break;
			}
		}
	}
}