import java.util.Scanner;
public class Main{
    public static void main(String[] args){
	Scanner scan = new Scanner(System.in);
	int x = scan.nextInt();
	int y = scan.nextInt();
	if (x < y) {
	    int tmp = y;
	    y = x;
	    x = tmp;
	}
	while (x % y != 0) {
	    int tmp = y;
	    y = x % y;
	    x = tmp;
	}
	System.out.println(gcd(x, y));
    }
    static int gcd (int x, int y) {
	for (int i = x; i > 0; i--) {
	    if (y % i == 0 && x % i == 0) {
		return i;
	    }
	}
	return 1;
    }
}
/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