Problem:
Print a Rectangle

Draw a rectangle which has a height of H cm and a width of W cm. Draw a 1-cm square by single '#'.

Input

The input consists of multiple datasets. Each dataset consists of two integers H and W separated by a single space.

The input ends with two 0 (when both H and W are zero).

Output

For each dataset, print the rectangle made of H × W '#'.

Print a blank line after each dataset.

Constraints

1 ≤ H ≤ 300

1 ≤ W ≤ 300

Sample Input

3 4
5 6
2 2
0 0

Sample Output

####
####
####

######
######
######
######
######

##
##

Solution in JAVA (judge verdict: Accepted)

import java.io.*;
import java.util.*;
  
public class Main{
    public static void main(String[] args)throws IOException, NumberFormatException{
        BufferedReader br = new BufferedReader (new InputStreamReader(System.in));
        ArrayList<Integer> h = new ArrayList<Integer>();
        ArrayList<Integer> w = new ArrayList<Integer>();
          
        while(true){
            String[] s = br.readLine().split(" ");
            if( "0".equals(s[0]) && "0".equals(s[1]) ) break;
              
            h.add( Integer.parseInt(s[0]) );
            w.add( Integer.parseInt(s[1]) );
        }
          
        StringBuilder builder = new StringBuilder();
        for( int i=0 ; i<h.size() ; i++ ){
            for( int j=0 ; j<h.get(i) ; j++ ){
                for( int k=0 ; k<w.get(i) ; k++ ){
                    builder.append("#");
                }
                builder.append("\n");
            }
            builder.append("\n");
        }
        System.out.print(builder);
    }
}