题解 | #单组_二维字符数组#

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 in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        int n = in.nextInt();
        int m = in.nextInt();
        in.nextLine();
        // char[]ch=str.toCharArray();
        char [][] c = new char [n][m];
        for (int j = n; j > 0; j--) {
            StringBuffer s = new StringBuffer(in.next());
            String str = s.reverse().toString();
            for (int i = m; i > 0; i--) {
                c[j - 1][i - 1] = str.charAt(i - 1);
            }
            in.nextLine();
        }
        int k = 0;
        
        while (k < n) {
            int z = 0;
            while (z < m) {
                System.out.print(c[k][z]);
                z++;
            }
            System.out.println();
            k++;
        }

    }
}