Added README.md file for Count Elements With at Least K Greater Values

Co-authored-by: Joshua Dierickse <[email protected]>

Author: 2 people

4141-count-elements-with-at-least-k-greater-values/README.md

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+<h2><a href="https://leetcode.com/problems/count-elements-with-at-least-k-greater-values">Count Elements With at Least K Greater Values</a></h2> <img src='https://img.shields.io/badge/Difficulty-Medium-orange' alt='Difficulty: Medium' /><hr><p>You are given an integer array <code>nums</code> of length <code>n</code> and an integer <code>k</code>.</p>
+
+<p>An element in <code>nums</code> is said to be <strong>qualified</strong> if there exist <strong>at least</strong> <code>k</code> elements in the array that are <strong>strictly greater</strong> than it.</p>
+
+<p>Return an integer denoting the total number of qualified elements in <code>nums</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 = [3,1,2], k = 1</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">2</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<p>The elements 1 and 2 each have at least <code>k = 1</code> element greater than themselves.<br />
+​​​​​​​No element is greater than 3. Therefore, the answer is 2.</p>
+</div>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<div class="example-block">
+<p><strong>Input:</strong> <span class="example-io">nums = [5,5,5], k = 2</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">0</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<p>Since all elements are equal to 5, no element is greater than the other. Therefore, the answer is 0.</p>
+</div>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= n == nums.length &lt;= 10<sup>5</sup></code></li>
+	<li><code>1 &lt;= nums[i] &lt;= 10<sup>9</sup></code></li>
+	<li><code>0 &lt;= k &lt; n</code></li>
+</ul>