import java.util.*;
import java.math.*;
import java.io.*;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		if(a == 100 || b == 100) {
			System.out.println(1);
			return;
		}
		if(a == 0 && b == 0) {
			System.out.println(0);
			return;
		}
		int MAX = Integer.MAX_VALUE;
		for(int i = 1;i < MAX ; i++) {
			for(int j = 0; i + j < MAX; j++) {
				double Aa = 100 * i / (double)(i + j);
				double Bb = 100 * j / (double)(i + j);
				int A = (int)Aa;
				int B = (int)Bb; 
				
				if(Aa - A >= 0.5) A++;
				if(Bb - B >= 0.5) B++;
				if(A == a && B == b) MAX = i + j;
				if(A < a) break;
			}
		}
		System.out.println(MAX);
	}
}