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81 lines
3.1 KiB
HTML
81 lines
3.1 KiB
HTML
<p>给你一个整数 <code>mountainHeight</code> 表示山的高度。</p>
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<p>同时给你一个整数数组 <code>workerTimes</code>,表示工人们的工作时间(单位:<strong>秒</strong>)。</p>
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<p>工人们需要 <strong>同时 </strong>进行工作以 <strong>降低 </strong>山的高度。对于工人 <code>i</code> :</p>
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<ul>
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<li>山的高度降低 <code>x</code>,需要花费 <code>workerTimes[i] + workerTimes[i] * 2 + ... + workerTimes[i] * x</code> 秒。例如:
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<ul>
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<li>山的高度降低 1,需要 <code>workerTimes[i]</code> 秒。</li>
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<li>山的高度降低 2,需要 <code>workerTimes[i] + workerTimes[i] * 2</code> 秒,依此类推。</li>
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</ul>
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</li>
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</ul>
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<p>返回一个整数,表示工人们使山的高度降低到 0 所需的 <strong>最少</strong> 秒数。</p>
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<p> </p>
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<p><strong class="example">示例 1:</strong></p>
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<div class="example-block">
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<p><strong>输入:</strong> <span class="example-io">mountainHeight = 4, workerTimes = [2,1,1]</span></p>
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<p><strong>输出:</strong> <span class="example-io">3</span></p>
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<p><strong>解释:</strong></p>
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<p>将山的高度降低到 0 的一种方式是:</p>
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<ul>
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<li>工人 0 将高度降低 1,花费 <code>workerTimes[0] = 2</code> 秒。</li>
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<li>工人 1 将高度降低 2,花费 <code>workerTimes[1] + workerTimes[1] * 2 = 3</code> 秒。</li>
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<li>工人 2 将高度降低 1,花费 <code>workerTimes[2] = 1</code> 秒。</li>
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</ul>
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<p>因为工人同时工作,所需的最少时间为 <code>max(2, 3, 1) = 3</code> 秒。</p>
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</div>
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<p><strong class="example">示例 2:</strong></p>
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<div class="example-block">
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<p><strong>输入:</strong> <span class="example-io">mountainHeight = 10, workerTimes = [3,2,2,4]</span></p>
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<p><strong>输出:</strong> <span class="example-io">12</span></p>
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<p><strong>解释:</strong></p>
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<ul>
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<li>工人 0 将高度降低 2,花费 <code>workerTimes[0] + workerTimes[0] * 2 = 9</code> 秒。</li>
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<li>工人 1 将高度降低 3,花费 <code>workerTimes[1] + workerTimes[1] * 2 + workerTimes[1] * 3 = 12</code> 秒。</li>
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<li>工人 2 将高度降低 3,花费 <code>workerTimes[2] + workerTimes[2] * 2 + workerTimes[2] * 3 = 12</code> 秒。</li>
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<li>工人 3 将高度降低 2,花费 <code>workerTimes[3] + workerTimes[3] * 2 = 12</code> 秒。</li>
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</ul>
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<p>所需的最少时间为 <code>max(9, 12, 12, 12) = 12</code> 秒。</p>
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</div>
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<p><strong class="example">示例 3:</strong></p>
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<div class="example-block">
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<p><strong>输入:</strong> <span class="example-io">mountainHeight = 5, workerTimes = [1]</span></p>
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<p><strong>输出:</strong> <span class="example-io">15</span></p>
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<p><strong>解释:</strong></p>
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<p>这个示例中只有一个工人,所以答案是 <code>workerTimes[0] + workerTimes[0] * 2 + workerTimes[0] * 3 + workerTimes[0] * 4 + workerTimes[0] * 5 = 15</code> 秒。</p>
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</div>
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<p> </p>
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<p><strong>提示:</strong></p>
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<ul>
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<li><code>1 <= mountainHeight <= 10<sup>5</sup></code></li>
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<li><code>1 <= workerTimes.length <= 10<sup>4</sup></code></li>
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<li><code>1 <= workerTimes[i] <= 10<sup>6</sup></code></li>
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</ul>
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