题解 | 单组_二维数组
单组_二维数组
https://www.nowcoder.com/practice/4df606b6c3764d9c969f8759c8a4807b
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); 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); } }