import java.math.BigInteger; import java.util.Arrays; import java.util.HashSet; import java.util.LinkedList; import java.util.Scanner; import java.util.Set; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); final BigInteger fst = BigInteger.valueOf(sc.nextLong()); final BigInteger snd = BigInteger.valueOf(sc.nextLong()); System.out.println(fst.add(snd).gcd(fst.multiply(snd))); } }