import java.math.BigInteger; import java.util.Scanner; public class Main { public static long gcd(long n,long r){ return r==0?n:gcd(r,n%r); } public static void main(String[] args) { Scanner sc=new Scanner(System.in); BigInteger a=sc.nextBigInteger(); BigInteger b=sc.nextBigInteger(); BigInteger s=a.add(b); BigInteger p=a.multiply(b); System.out.println(s.gcd(p)); } }