题解 | 多组_二维数组_T组形式

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        int t = in.nextInt();
        while(t-- > 0){
            int raw = in.nextInt();
            int col = in.nextInt();
            long sum  = 0;
            for(int i = 0; i < raw; i++){
                for(int j = 0; j < col; j++){
                    sum += in.nextInt();
                }
            }
            System.out.println(sum);
        }
    }
}