PIO9 题解 | 多组_二维数组_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 sc = new Scanner(System.in);
        int t = sc.nextInt();
        long [] sum = new long[t];
        int k = 0;
        while (k < t){
            sum[k] = 0;
            int n = sc.nextInt();
            int m = sc.nextInt();
            int [] [] arr = new int[n][m];
            for (int i = 0; i < n; i++){
                for (int j = 0; j < m; j++){
                    arr[i][j] = sc.nextInt();
                    sum[k] += arr[i][j];
                }
            }
            k++;
        }
        for(int i = 0; i < t; i++){
            System.out.println(sum[i]);
        }
        sc.close();
    }
}