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();
		int ans = Integer.MAX_VALUE;
		
		for(int a=1; a<=100; a++) {
			for(int b=1; b<=100; b++) {
				int tmpA =  Math.round((100f * a / (a+b)));
				int tmpB =  Math.round((100f * b / (a+b)));
				if(A == tmpA && B == tmpB) {
					ans = Math.min(ans, a+b);
				}
			}
		}
		System.out.println(ans);
	}
}