Added README.md file for Minimum Average of Smallest and Largest Elements

Author: kaleaditya779

3471-minimum-average-of-smallest-and-largest-elements/README.md

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+<h2><a href="https://leetcode.com/problems/minimum-average-of-smallest-and-largest-elements">Minimum Average of Smallest and Largest Elements</a></h2> <img src='https://img.shields.io/badge/Difficulty-Easy-brightgreen' alt='Difficulty: Easy' /><hr><p>You have an array of floating point numbers <code>averages</code> which is initially empty. You are given an array <code>nums</code> of <code>n</code> integers where <code>n</code> is even.</p>
+
+<p>You repeat the following procedure <code>n / 2</code> times:</p>
+
+<ul>
+	<li>Remove the <strong>smallest</strong> element, <code>minElement</code>, and the <strong>largest</strong> element <code>maxElement</code>,&nbsp;from <code>nums</code>.</li>
+	<li>Add <code>(minElement + maxElement) / 2</code> to <code>averages</code>.</li>
+</ul>
+
+<p>Return the <strong>minimum</strong> element in <code>averages</code>.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<div class="example-block">
+<p><strong>Input:</strong> <span class="example-io">nums = [7,8,3,4,15,13,4,1]</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">5.5</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<table>
+	<tbody>
+		<tr>
+			<th>step</th>
+			<th>nums</th>
+			<th>averages</th>
+		</tr>
+		<tr>
+			<td>0</td>
+			<td>[7,8,3,4,15,13,4,1]</td>
+			<td>[]</td>
+		</tr>
+		<tr>
+			<td>1</td>
+			<td>[7,8,3,4,13,4]</td>
+			<td>[8]</td>
+		</tr>
+		<tr>
+			<td>2</td>
+			<td>[7,8,4,4]</td>
+			<td>[8,8]</td>
+		</tr>
+		<tr>
+			<td>3</td>
+			<td>[7,4]</td>
+			<td>[8,8,6]</td>
+		</tr>
+		<tr>
+			<td>4</td>
+			<td>[]</td>
+			<td>[8,8,6,5.5]</td>
+		</tr>
+	</tbody>
+</table>
+The smallest element of averages, 5.5, is returned.</div>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<div class="example-block">
+<p><strong>Input:</strong> <span class="example-io">nums = [1,9,8,3,10,5]</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">5.5</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<table>
+	<tbody>
+		<tr>
+			<th>step</th>
+			<th>nums</th>
+			<th>averages</th>
+		</tr>
+		<tr>
+			<td>0</td>
+			<td><span class="example-io">[1,9,8,3,10,5]</span></td>
+			<td>[]</td>
+		</tr>
+		<tr>
+			<td>1</td>
+			<td><span class="example-io">[9,8,3,5]</span></td>
+			<td>[5.5]</td>
+		</tr>
+		<tr>
+			<td>2</td>
+			<td><span class="example-io">[8,5]</span></td>
+			<td>[5.5,6]</td>
+		</tr>
+		<tr>
+			<td>3</td>
+			<td>[]</td>
+			<td>[5.5,6,6.5]</td>
+		</tr>
+	</tbody>
+</table>
+</div>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<div class="example-block">
+<p><strong>Input:</strong> <span class="example-io">nums = [1,2,3,7,8,9]</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">5.0</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<table>
+	<tbody>
+		<tr>
+			<th>step</th>
+			<th>nums</th>
+			<th>averages</th>
+		</tr>
+		<tr>
+			<td>0</td>
+			<td><span class="example-io">[1,2,3,7,8,9]</span></td>
+			<td>[]</td>
+		</tr>
+		<tr>
+			<td>1</td>
+			<td><span class="example-io">[2,3,7,8]</span></td>
+			<td>[5]</td>
+		</tr>
+		<tr>
+			<td>2</td>
+			<td><span class="example-io">[3,7]</span></td>
+			<td>[5,5]</td>
+		</tr>
+		<tr>
+			<td>3</td>
+			<td><span class="example-io">[]</span></td>
+			<td>[5,5,5]</td>
+		</tr>
+	</tbody>
+</table>
+</div>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>2 &lt;= n == nums.length &lt;= 50</code></li>
+	<li><code>n</code> is even.</li>
+	<li><code>1 &lt;= nums[i] &lt;= 50</code></li>
+</ul>