Java题解

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int m = scan.nextInt();
        int n = scan.nextInt();
        int r;
        while (n != 0) {
            r = m%n;
            m = n;
            n = r;
        }
        System.out.printf("%d", m);
        scan.close();
    }
}