mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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188 lines
17 KiB
JSON
188 lines
17 KiB
JSON
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"title": "Maximum Units on a Truck",
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"content": "<p>You are assigned to put some amount of boxes onto <strong>one truck</strong>. You are given a 2D array <code>boxTypes</code>, where <code>boxTypes[i] = [numberOfBoxes<sub>i</sub>, numberOfUnitsPerBox<sub>i</sub>]</code>:</p>\n\n<ul>\n\t<li><code>numberOfBoxes<sub>i</sub></code> is the number of boxes of type <code>i</code>.</li>\n\t<li><code>numberOfUnitsPerBox<sub>i</sub></code><sub> </sub>is the number of units in each box of the type <code>i</code>.</li>\n</ul>\n\n<p>You are also given an integer <code>truckSize</code>, which is the <strong>maximum</strong> number of <strong>boxes</strong> that can be put on the truck. You can choose any boxes to put on the truck as long as the number of boxes does not exceed <code>truckSize</code>.</p>\n\n<p>Return <em>the <strong>maximum</strong> total number of <strong>units</strong> that can be put on the truck.</em></p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> boxTypes = [[1,3],[2,2],[3,1]], truckSize = 4\n<strong>Output:</strong> 8\n<strong>Explanation:</strong> There are:\n- 1 box of the first type that contains 3 units.\n- 2 boxes of the second type that contain 2 units each.\n- 3 boxes of the third type that contain 1 unit each.\nYou can take all the boxes of the first and second types, and one box of the third type.\nThe total number of units will be = (1 * 3) + (2 * 2) + (1 * 1) = 8.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> boxTypes = [[5,10],[2,5],[4,7],[3,9]], truckSize = 10\n<strong>Output:</strong> 91\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= boxTypes.length <= 1000</code></li>\n\t<li><code>1 <= numberOfBoxes<sub>i</sub>, numberOfUnitsPerBox<sub>i</sub> <= 1000</code></li>\n\t<li><code>1 <= truckSize <= 10<sup>6</sup></code></li>\n</ul>\n",
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"code": "# @param {Integer[][]} box_types\n# @param {Integer} truck_size\n# @return {Integer}\ndef maximum_units(box_types, truck_size)\n \nend",
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"If we have space for at least one box, it's always optimal to put the box with the most units.",
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"Sort the box types with the number of units per box non-increasingly.",
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"Iterate on the box types and take from each type as many as you can."
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