Java 代码

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);

        int r = cin.nextInt();
        int c = cin.nextInt();

        int n = 0;
        for (int i = 0; i < r; i++)
        {
            for (int j = 0; j < c; j++)
            {
                n += 1;
                if (j == c - 1)
                    System.out.println ("PUM");
                else 
                    System.out.print(n + " ");
            }
        }
    }
}