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 C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ITP1_5_A
{
    class Program
    {
        static void Main(string[] args)
        {
            //縦Hcm、横Wcmの長方形を描く
            //1cm×1cmの正方形を'#'で表す
            //H,Wがともに0の時入力の終了

            
            while (true)                        //以下の処理をbreak条件が与えられるまで繰り返す
            {
                string[] str = Console.ReadLine().Split(' ');
                int H = int.Parse(str[0]);          //H 長方形の縦
                int W = int.Parse(str[1]);          //W 長方形の横

                int i1;                             //以下のfor文にてHに対応して用いる変数
                int i2;                             //以下のfor文にてWに対応して用いる変数

                if (H == 0 && W == 0)
                {
                    break;                      //H,Wが0の時、処理の終了
                }

                else
                {
                    for (i1 = 0; i1 < H; i1++)      //縦に以下の処理を何回繰り返すか？
                    {
                        for (i2 = 0; i2 < W; i2++)  //#を書く処理を何回繰り返すか？
                        {
                            Console.Write("#");     //横にW個の#を表示させる
                        }
                        Console.WriteLine();        //改行する
                    }
                    Console.WriteLine("");
                }
            }
        }
    }
}