import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int x = Integer.parseInt(scanner.next());
        int y = Integer.parseInt(scanner.next());

        if (x == y) {
            System.out.println(x);
            return;
        }

        if (x < y) {
            int tmp = x;
            x = y;
            y = tmp;
        }

        while (true) {
            int z = x % y;
            if (x % z == 0 && y % z == 0) {
                System.out.println(z);
                break;
            }
            x = y;
            y = z;
        }
    }
}
/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