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remove-element/README.md

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+<h2>  Remove Element</h2><hr><div><p>Given an integer array <code>nums</code> and an integer <code>val</code>, remove all occurrences of <code>val</code> in <code>nums</code> <a href="https://en.wikipedia.org/wiki/In-place_algorithm" target="_blank"><strong>in-place</strong></a>. The relative order of the elements may be changed.</p>
+
+<p>Since it is impossible to change the length of the array in some languages, you must instead have the result be placed in the <strong>first part</strong> of the array <code>nums</code>. More formally, if there are <code>k</code> elements after removing the duplicates, then the first <code>k</code> elements of <code>nums</code> should hold the final result. It does not matter what you leave beyond the first <code>k</code> elements.</p>
+
+<p>Return <code>k</code><em> after placing the final result in the first </em><code>k</code><em> slots of </em><code>nums</code>.</p>
+
+<p>Do <strong>not</strong> allocate extra space for another array. You must do this by <strong>modifying the input array <a href="https://en.wikipedia.org/wiki/In-place_algorithm" target="_blank">in-place</a></strong> with O(1) extra memory.</p>
+
+<p><strong>Custom Judge:</strong></p>
+
+<p>The judge will test your solution with the following code:</p>
+
+<pre>int[] nums = [...]; // Input array
+int val = ...; // Value to remove
+int[] expectedNums = [...]; // The expected answer with correct length.
+                            // It is sorted with no values equaling val.
+
+int k = removeElement(nums, val); // Calls your implementation
+
+assert k == expectedNums.length;
+sort(nums, 0, k); // Sort the first k elements of nums
+for (int i = 0; i &lt; actualLength; i++) {
+    assert nums[i] == expectedNums[i];
+}
+</pre>
+
+<p>If all assertions pass, then your solution will be <strong>accepted</strong>.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre><strong>Input:</strong> nums = [3,2,2,3], val = 3
+<strong>Output:</strong> 2, nums = [2,2,_,_]
+<strong>Explanation:</strong> Your function should return k = 2, with the first two elements of nums being 2.
+It does not matter what you leave beyond the returned k (hence they are underscores).
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre><strong>Input:</strong> nums = [0,1,2,2,3,0,4,2], val = 2
+<strong>Output:</strong> 5, nums = [0,1,4,0,3,_,_,_]
+<strong>Explanation:</strong> Your function should return k = 5, with the first five elements of nums containing 0, 0, 1, 3, and 4.
+Note that the five elements can be returned in any order.
+It does not matter what you leave beyond the returned k (hence they are underscores).
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>0 &lt;= nums.length &lt;= 100</code></li>
+	<li><code>0 &lt;= nums[i] &lt;= 50</code></li>
+	<li><code>0 &lt;= val &lt;= 100</code></li>
+</ul>
+</div>