백준 1037번

원본 : www.acmicpc.net/problem/1037

1037번: 약수

 

풀이

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Arrays;

public class Main {

	public static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
	public static BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));

	public static void main(String[] args) throws Exception {
		int n = Integer.parseInt(reader.readLine());
		long arrNum[] = Arrays.stream(reader.readLine().split(" ")).mapToLong(Long::parseLong).toArray();
		Arrays.sort(arrNum);
		
		writer.write(arrNum[0] * arrNum[n - 1] + "");
		writer.flush();
	}
	
}