<p>You are given an <code>m x n</code> matrix of characters <code>box</code> representing a side-view of a box. Each cell of the box is one of the following:</p>

<ul>
	<li>A stone <code>&#39;#&#39;</code></li>
	<li>A stationary obstacle <code>&#39;*&#39;</code></li>
	<li>Empty <code>&#39;.&#39;</code></li>
</ul>

<p>The box is rotated <strong>90 degrees clockwise</strong>, causing some of the stones to fall due to gravity. Each stone falls down until it lands on an obstacle, another stone, or the bottom of the box. Gravity <strong>does not</strong> affect the obstacles&#39; positions, and the inertia from the box&#39;s rotation <strong>does not </strong>affect the stones&#39; horizontal positions.</p>

<p>It is <strong>guaranteed</strong> that each stone in <code>box</code> rests on an obstacle, another stone, or the bottom of the box.</p>

<p>Return <em>an </em><code>n x m</code><em> matrix representing the box after the rotation described above</em>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<p><img alt="" src="https://assets.leetcode.com/uploads/2021/04/08/rotatingtheboxleetcodewithstones.png" style="width: 300px; height: 150px;" /></p>

<pre>
<strong>Input:</strong> box = [[&quot;#&quot;,&quot;.&quot;,&quot;#&quot;]]
<strong>Output:</strong> [[&quot;.&quot;],
&nbsp;        [&quot;#&quot;],
&nbsp;        [&quot;#&quot;]]
</pre>

<p><strong class="example">Example 2:</strong></p>

<p><img alt="" src="https://assets.leetcode.com/uploads/2021/04/08/rotatingtheboxleetcode2withstones.png" style="width: 375px; height: 195px;" /></p>

<pre>
<strong>Input:</strong> box = [[&quot;#&quot;,&quot;.&quot;,&quot;*&quot;,&quot;.&quot;],
&nbsp;             [&quot;#&quot;,&quot;#&quot;,&quot;*&quot;,&quot;.&quot;]]
<strong>Output:</strong> [[&quot;#&quot;,&quot;.&quot;],
&nbsp;        [&quot;#&quot;,&quot;#&quot;],
&nbsp;        [&quot;*&quot;,&quot;*&quot;],
&nbsp;        [&quot;.&quot;,&quot;.&quot;]]
</pre>

<p><strong class="example">Example 3:</strong></p>

<p><img alt="" src="https://assets.leetcode.com/uploads/2021/04/08/rotatingtheboxleetcode3withstone.png" style="width: 400px; height: 218px;" /></p>

<pre>
<strong>Input:</strong> box = [[&quot;#&quot;,&quot;#&quot;,&quot;*&quot;,&quot;.&quot;,&quot;*&quot;,&quot;.&quot;],
&nbsp;             [&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;*&quot;,&quot;.&quot;,&quot;.&quot;],
&nbsp;             [&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;.&quot;,&quot;#&quot;,&quot;.&quot;]]
<strong>Output:</strong> [[&quot;.&quot;,&quot;#&quot;,&quot;#&quot;],
&nbsp;        [&quot;.&quot;,&quot;#&quot;,&quot;#&quot;],
&nbsp;        [&quot;#&quot;,&quot;#&quot;,&quot;*&quot;],
&nbsp;        [&quot;#&quot;,&quot;*&quot;,&quot;.&quot;],
&nbsp;        [&quot;#&quot;,&quot;.&quot;,&quot;*&quot;],
&nbsp;        [&quot;#&quot;,&quot;.&quot;,&quot;.&quot;]]
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>m == box.length</code></li>
	<li><code>n == box[i].length</code></li>
	<li><code>1 &lt;= m, n &lt;= 500</code></li>
	<li><code>box[i][j]</code> is either <code>&#39;#&#39;</code>, <code>&#39;*&#39;</code>, or <code>&#39;.&#39;</code>.</li>
</ul>
class Solution:
    def rotateTheBox(self, box: List[List[str]]) -> List[List[str]]:
        r, c = len(box), len(box[0])

        for row in box:
            i, j = len(row)-2, len(row)-1
            while i >= 0:
                if row[j] == '.':
                    if row[i] == '#':
                        row[j] = "#"
                        row[i]= '.'
                        j -=1
                        i-=1

                    elif row[i] == '.':
                        i-=1
                    elif row[i] == '*':
                        j = i-1
                        i = j-1
                else:
                    j-=1
                    i=j-1

        newBox = [[0 for _ in range(r)] for _ in range(c)]
        for i in range(r-1, -1, -1):
            for j in range(c):
                newBox[j][r-1-i] = box[i][j]
        return newBox

                        


        
27800