
import java.util.Scanner;

public class Main {
    static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {
        int x = sc.nextInt();
        int y = sc.nextInt();
        int result = 0;
        if(x > y){
            result = gcd(x, y);
        } else {
            result = gcd(y, x);
        }
        System.out.println(result);
    }

    static int gcd(int x, int y){
        if(y == 0){
            return x;
        } else {
            return gcd(y, x % y);
        }   
    }
}


/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz