杭电 -- 2092

import java.util.Scanner; public class HD2092 { public static void main(String[] args) {
        Scanner in = new Scanner(System.in); int n, m, x, y;
        String ans; while (in.hasNext()) {
            n = in.nextInt();
            m = in.nextInt(); if (n == 0 && m == 0) break;
            ans = "No"; // import step for (x = -9999; x < 10000; x++) {
                y = n - x; if (y > -10000 && y < 10000) { if (x * y == m) {
                        ans = "Yes"; break;
                    }
                }
            }
            System.out.println(ans);
        }
        in.close();
    }
}