import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int A = scan.nextInt();
		int B = scan.nextInt();
		scan.close();
		if(A < B) {
			int t = A;
			A = B;
			B = t;
		}
		int min = 200;
		for(int a = 1; a <= 100; a++) {
			for(int b = 0; b <= 100; b++) {
				double k1 = (double) 100 * a / (a + b);
				double k2 = (double) 100 * b / (a + b);
				int k3 = (int)Math.round(k1);
				int k4 = (int)Math.round(k2);
				if(k3 == A && k4 == B) {
					if(min > a + b) {
						min = a + b;
					}
				}
			}
		}
		System.out.println(min);
	}
}