mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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192 lines
28 KiB
JSON
192 lines
28 KiB
JSON
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"title": "Car Fleet",
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"content": "<p>There are <code>n</code> cars at given miles away from the starting mile 0, traveling to reach the mile <code>target</code>.</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 starting mile 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 cannot pass another car, but it can catch up and then travel next to it at the speed of the slower car.</p>\n\n<p>A <strong>car fleet</strong> is a car or cars driving next to each other. The speed of the car fleet is the <strong>minimum</strong> speed of any car in the fleet.</p>\n\n<p>If a car catches up to a car fleet at the mile <code>target</code>, it will still be considered as part of the car fleet.</p>\n\n<p>Return the number of car fleets that will arrive at the destination.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">3</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<ul>\n\t<li>The cars starting at 10 (speed 2) and 8 (speed 4) become a fleet, meeting each other at 12. The fleet forms at <code>target</code>.</li>\n\t<li>The car starting at 0 (speed 1) does not catch up to any other car, so it is a fleet by itself.</li>\n\t<li>The 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 <code>target</code>.</li>\n</ul>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">target = 10, position = [3], speed = [3]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">1</span></p>\n\n<p><strong>Explanation:</strong></p>\nThere is only one car, hence there is only one fleet.</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">target = 100, position = [0,2,4], speed = [4,2,1]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">1</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<ul>\n\t<li>The cars starting at 0 (speed 4) and 2 (speed 2) become a fleet, meeting each other at 4. The car starting at 4 (speed 1) travels to 5.</li>\n\t<li>Then, the fleet at 4 (speed 2) and the car at position 5 (speed 1) become one fleet, meeting each other at 6. The fleet moves at speed 1 until it reaches <code>target</code>.</li>\n</ul>\n</div>\n\n<p> </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 <= n <= 10<sup>5</sup></code></li>\n\t<li><code>0 < target <= 10<sup>6</sup></code></li>\n\t<li><code>0 <= position[i] < target</code></li>\n\t<li>All the values of <code>position</code> are <strong>unique</strong>.</li>\n\t<li><code>0 < speed[i] <= 10<sup>6</sup></code></li>\n</ul>\n",
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"translatedTitle": "车队",
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"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 <code>target</code> 。</p>\n\n<p>给定两个整数数组 <code>position</code> 和 <code>speed</code> ,长度都是 <code>n</code> ,其中 <code>position[i]</code> 是第 <code>i</code> 辆车的位置, <code>speed[i]</code> 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,并以较慢车的速度在另一辆车旁边行驶。</p>\n\n<p><strong>车队 </strong>是指并排行驶的一辆或几辆汽车。车队的速度是车队中 <strong>最慢</strong> 的车的速度。</p>\n\n<p>即便一辆车在 <code>target</code> 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>返回到达目的地的车队数量 。</p>\n\n<p> </p>\n\n<p><strong class=\"example\">示例 1:</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入:</b>target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]</span></p>\n\n<p><span class=\"example-io\"><b>输出:</b>3</span></p>\n\n<p><strong>解释:</strong></p>\n\n<ul>\n\t<li>从 10(速度为 2)和 8(速度为 4)开始的车会组成一个车队,它们在 12 相遇。车队在 <code>target</code> 形成。</li>\n\t<li>从 0(速度为 1)开始的车不会追上其它任何车,所以它自己是一个车队。</li>\n\t<li>从 5(速度为 1) 和 3(速度为 3)开始的车组成一个车队,在 6 相遇。车队以速度 1 移动直到它到达 <code>target</code>。</li>\n</ul>\n</div>\n\n<p><strong class=\"example\">示例 2:</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入:</b></span><span class=\"example-io\">target = 10, position = [3], speed = [3]</span></p>\n\n<p><span class=\"example-io\"><b>输出:</b></span><span class=\"example-io\">1</span></p>\n\n<p><strong>解释:</strong></p>\n只有一辆车,因此只有一个车队。</div>\n\n<p><strong class=\"example\">示例 3:</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入:</b></span><span class=\"example-io\">target = 100, position = [0,2,4], speed = [4,2,1]</span></p>\n\n<p><span class=\"example-io\"><b>输出:</b></span><span class=\"example-io\">1</span></p>\n\n<p><strong>解释:</strong></p>\n\n<ul>\n\t<li>从 0(速度为 4) 和 2(速度为 2)开始的车组成一个车队,在 4 相遇。从 4 开始的车(速度为 1)移动到了 5。</li>\n\t<li>然后,在 4(速度为 2)的车队和在 5(速度为 1)的车成为一个车队,在 6 相遇。车队以速度 1 移动直到它到达 <code>target</code>。</li>\n</ul>\n</div>\n\n<p> </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 <= n <= 10<sup>5</sup></code></li>\n\t<li><code>0 < target <= 10<sup>6</sup></code></li>\n\t<li><code>0 <= position[i] < target</code></li>\n\t<li><code>position</code> 中每个值都 <strong>不同</strong></li>\n\t<li><code>0 < speed[i] <= 10<sup>6</sup></code></li>\n</ul>\n",
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