题解 | 单组_二维字符数组

import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;


// 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 in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt();
        in.nextLine();
        List<String> arr = new ArrayList<>();
        for (int i = 0; i < n; ++i) {
            String line = in.nextLine();
            arr.add(line);
        }

        for (int i = arr.size() - 1; i >= 0; --i) {
            String line = arr.get(i);
            System.out.println(new StringBuilder(line).reverse().toString());
        }

        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int a = in.nextInt();
            int b = in.nextInt();
            System.out.println(a + b);
        }
    }
}