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406-queue-reconstruction-by-height/README.md

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+<h2><a href="https://leetcode.com/problems/queue-reconstruction-by-height/">406. Queue Reconstruction by Height</a></h2><h3>Medium</h3><hr><div><p>You are given an array of people, <code>people</code>, which are the attributes of some people in a queue (not necessarily in order). Each <code>people[i] = [h<sub>i</sub>, k<sub>i</sub>]</code> represents the <code>i<sup>th</sup></code> person of height <code>h<sub>i</sub></code> with <strong>exactly</strong> <code>k<sub>i</sub></code> other people in front who have a height greater than or equal to <code>h<sub>i</sub></code>.</p>
+
+<p>Reconstruct and return <em>the queue that is represented by the input array </em><code>people</code>. The returned queue should be formatted as an array <code>queue</code>, where <code>queue[j] = [h<sub>j</sub>, k<sub>j</sub>]</code> is the attributes of the <code>j<sup>th</sup></code> person in the queue (<code>queue[0]</code> is the person at the front of the queue).</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre><strong>Input:</strong> people = [[7,0],[4,4],[7,1],[5,0],[6,1],[5,2]]
+<strong>Output:</strong> [[5,0],[7,0],[5,2],[6,1],[4,4],[7,1]]
+<strong>Explanation:</strong>
+Person 0 has height 5 with no other people taller or the same height in front.
+Person 1 has height 7 with no other people taller or the same height in front.
+Person 2 has height 5 with two persons taller or the same height in front, which is person 0 and 1.
+Person 3 has height 6 with one person taller or the same height in front, which is person 1.
+Person 4 has height 4 with four people taller or the same height in front, which are people 0, 1, 2, and 3.
+Person 5 has height 7 with one person taller or the same height in front, which is person 1.
+Hence [[5,0],[7,0],[5,2],[6,1],[4,4],[7,1]] is the reconstructed queue.
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre><strong>Input:</strong> people = [[6,0],[5,0],[4,0],[3,2],[2,2],[1,4]]
+<strong>Output:</strong> [[4,0],[5,0],[2,2],[3,2],[1,4],[6,0]]
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= people.length &lt;= 2000</code></li>
+	<li><code>0 &lt;= h<sub>i</sub> &lt;= 10<sup>6</sup></code></li>
+	<li><code>0 &lt;= k<sub>i</sub> &lt; people.length</code></li>
+	<li>It is guaranteed that the queue can be reconstructed.</li>
+</ul>
+</div>