题解 | 最大公因数与最小公倍数

import java.io.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
   public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));

        String[] str = br.readLine().trim().split("\\s+");
        Long a = Long.parseLong(str[0]);
        Long b = Long.parseLong(str[1]);

        long g = gcd(a,b);

        long l = (a==0||b==0)?0:(a/g)*b;

        out.println(g+" "+l);
        out.flush();
        out.close();
        br.close();
    }

    private static long gcd(long a, long b) {

        while (b != 0) {
            long tmp = b;
            b = a%b;
            a=tmp;
        }
        return a;
    }
}