hdu steps 1.2.4 Buildings

import java.util.Scanner;public class Main {public static void main(String[] args) {int n,a,b;int t;Scanner in = new Scanner(System.in);n = in.nextInt();while( n-- > 0){int sum = 0;a = in.nextInt();b = in.nextInt();for(int i=0;i<a*b;i++){sum+=in.nextInt();}System.out.println(sum);}}}