import java.util.Scanner;


public class Main_yukicoder338 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();
        int b = sc.nextInt();

        int min = Integer.MAX_VALUE;
        for (int i = 0; i <= 200; i++) {
            for (int j = 0; j <= 200; j++) {
            	int tmp = i + j;
            	if (tmp == 0) {
            		continue;
            	}

            	int tmpa = (int)Math.round((double)100 * i / tmp);
            	int tmpb = (int)Math.round((double)100 * j / tmp);

            	if (tmpa == a && tmpb == b) {
            		min = Math.min(min, tmp);
            	}
            }
        }

        System.out.println(min);

        sc.close();
    }
}