题解 | 单组_二维数组

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 n = scanner.nextInt(),m = scanner.nextInt();
        long sum = 0;
        while(scanner.hasNext()){
            int a = scanner.nextInt();
            
                 sum += a;
        }
        System.out.println(sum);
    }
}