算法训练 动态数组使用

Problem:

AcCode: 

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		long sum = 0;
		List<Integer> list = new ArrayList<Integer>();
		for (int i = 0; i < n; i++) {
			list.add(in.nextInt());
			sum+=list.get(i);
		}
		System.out.println(sum+" "+(sum/n));
	}
}