leetcode-problemset/leetcode-cn/originData/car-fleet.json

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            "title": "Car Fleet",
            "titleSlug": "car-fleet",
            "content": "<p>There are <code>n</code> cars going to the same destination along a one-lane road. The destination is <code>target</code> miles away.</p>\n\n<p>You are given two integer array <code>position</code> and <code>speed</code>, both of length <code>n</code>, where <code>position[i]</code> is the position of the <code>i<sup>th</sup></code> car and <code>speed[i]</code> is the speed of the <code>i<sup>th</sup></code> car (in miles per hour).</p>\n\n<p>A car can never pass another car ahead of it, but it can catch up to it&nbsp;and drive bumper to bumper <strong>at the same speed</strong>. The faster car will <strong>slow down</strong> to match the slower car&#39;s speed. The distance between these two cars is ignored (i.e., they are assumed to have the same position).</p>\n\n<p>A <strong>car fleet</strong> is some non-empty set of cars driving at the same position and same speed. Note that a single car is also a car fleet.</p>\n\n<p>If a car catches up to a car fleet right at the destination point, it will still be considered as one car fleet.</p>\n\n<p>Return <em>the <strong>number of car fleets</strong> that will arrive at the destination</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong>\nThe cars starting at 10 (speed 2) and 8 (speed 4) become a fleet, meeting each other at 12.\nThe car starting at 0 does not catch up to any other car, so it is a fleet by itself.\nThe cars starting at 5 (speed 1) and 3 (speed 3) become a fleet, meeting each other at 6. The fleet moves at speed 1 until it reaches target.\nNote that no other cars meet these fleets before the destination, so the answer is 3.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> target = 10, position = [3], speed = [3]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> There is only one car, hence there is only one fleet.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> target = 100, position = [0,2,4], speed = [4,2,1]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong>\nThe cars starting at 0 (speed 4) and 2 (speed 2) become a fleet, meeting each other at 4. The fleet moves at speed 2.\nThen, the fleet (speed 2) and the car starting at 4 (speed 1) become one fleet, meeting each other at 6. The fleet moves at speed 1 until it reaches target.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == position.length == speed.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 10<sup>5</sup></code></li>\n\t<li><code>0 &lt; target &lt;= 10<sup>6</sup></code></li>\n\t<li><code>0 &lt;= position[i] &lt; target</code></li>\n\t<li>All the values of <code>position</code> are <strong>unique</strong>.</li>\n\t<li><code>0 &lt; speed[i] &lt;= 10<sup>6</sup></code></li>\n</ul>\n",
            "translatedTitle": "车队",
            "translatedContent": "<p>在一条单行道上，有 <code>n</code> 辆车开往同一目的地。目的地是几英里以外的&nbsp;<code>target</code>&nbsp;。</p>\n\n<p>给定两个整数数组&nbsp;<code>position</code>&nbsp;和&nbsp;<code>speed</code>&nbsp;，长度都是 <code>n</code> ，其中&nbsp;<code>position[i]</code>&nbsp;是第 <code>i</code> 辆车的位置，&nbsp;<code>speed[i]</code>&nbsp;是第 <code>i</code> 辆车的速度(单位是英里/小时)。</p>\n\n<p>一辆车永远不会超过前面的另一辆车，但它可以追上去，并与前车 <strong>以相同的速度</strong> 紧接着行驶。此时，我们会忽略这两辆车之间的距离，也就是说，它们被假定处于相同的位置。</p>\n\n<p><strong>车队</strong><em>&nbsp;</em>是一些由行驶在相同位置、具有相同速度的车组成的非空集合。注意，一辆车也可以是一个车队。</p>\n\n<p>即便一辆车在目的地才赶上了一个车队，它们仍然会被视作是同一个车队。</p>\n\n<p>返回到达目的地的 <strong>车队数量</strong> 。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]\n<strong>输出：</strong>3\n<strong>解释：</strong>\n从 10 和 8 开始的车会组成一个车队，它们在 12 处相遇。\n从 0 处开始的车无法追上其它车，所以它自己就是一个车队。\n从 5 和 3 开始的车会组成一个车队，它们在 6 处相遇。\n请注意，在到达目的地之前没有其它车会遇到这些车队，所以答案是 3。\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong> target = 10, position = [3], speed = [3]\n<strong>输出:</strong> 1\n<strong>解释:</strong> 只有一辆车，因此只有一个车队。\n</pre>\n\n<p><strong>示例 3:</strong></p>\n\n<pre>\n<strong>输入:</strong> target = 100, position = [0,2,4], speed = [4,2,1]\n<strong>输出:</strong> 1\n<strong>解释:</strong>\n以0(速度4)和2(速度2)出发的车辆组成车队，在4点相遇。舰队以2的速度前进。\n然后，车队(速度2)和以4(速度1)出发的汽车组成一个车队，在6点相遇。舰队以1的速度前进，直到到达目标。</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>n == position.length == speed.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 10<sup>5</sup></code></li>\n\t<li><code>0 &lt; target &lt;= 10<sup>6</sup></code></li>\n\t<li><code>0 &lt;= position[i] &lt; target</code></li>\n\t<li><code>position</code>&nbsp;中每个值都 <strong>不同</strong></li>\n\t<li><code>0 &lt; speed[i] &lt;= 10<sup>6</sup></code></li>\n</ul>\n",
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