题解 | #多组_一维数组_T组形式#

import java.util.Scanner;

// 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) {
        Scanner scanner = new Scanner(System.in);
        int t = scanner.nextInt();
        while (t > 0) {
            int n = scanner.nextInt();
            long sum = 0L;
            for (int j = 0; j < n; j++) {
                sum += scanner.nextInt();
            }
            System.out.println(sum);
            t--;
        }
        scanner.close();
    }
}