import java.util.*;
import java.math.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        BigInteger a = new BigInteger(sc.next());
        BigInteger b = new BigInteger(sc.next());
        
        BigInteger s = a.add(b);
        BigInteger p = a.multiply(b);
        
        System.out.println(s.gcd(p).toString());
    }
}