mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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199 lines
18 KiB
JSON
199 lines
18 KiB
JSON
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"questionId": "406",
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"title": "Queue Reconstruction by Height",
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"content": "<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>\n\n<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>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> people = [[7,0],[4,4],[7,1],[5,0],[6,1],[5,2]]\n<strong>Output:</strong> [[5,0],[7,0],[5,2],[6,1],[4,4],[7,1]]\n<strong>Explanation:</strong>\nPerson 0 has height 5 with no other people taller or the same height in front.\nPerson 1 has height 7 with no other people taller or the same height in front.\nPerson 2 has height 5 with two persons taller or the same height in front, which is person 0 and 1.\nPerson 3 has height 6 with one person taller or the same height in front, which is person 1.\nPerson 4 has height 4 with four people taller or the same height in front, which are people 0, 1, 2, and 3.\nPerson 5 has height 7 with one person taller or the same height in front, which is person 1.\nHence [[5,0],[7,0],[5,2],[6,1],[4,4],[7,1]] is the reconstructed queue.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> people = [[6,0],[5,0],[4,0],[3,2],[2,2],[1,4]]\n<strong>Output:</strong> [[4,0],[5,0],[2,2],[3,2],[1,4],[6,0]]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= people.length <= 2000</code></li>\n\t<li><code>0 <= h<sub>i</sub> <= 10<sup>6</sup></code></li>\n\t<li><code>0 <= k<sub>i</sub> < people.length</code></li>\n\t<li>It is guaranteed that the queue can be reconstructed.</li>\n</ul>\n",
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"What can you say about the position of the shortest person? </br>\r\nIf the position of the shortest person is <i>i</i>, how many people would be in front of the shortest person?",
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"Once you fix the position of the shortest person, what can you say about the position of the second shortest person?"
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