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| <h2><a href="https://leetcode.com/problems/maximum-units-on-a-truck/">1710. Maximum Units on a Truck</a></h2><h3>Easy</h3><hr><div><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> | ||
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| <ul> | ||
| <li><code>numberOfBoxes<sub>i</sub></code> is the number of boxes of type <code>i</code>.</li> | ||
| <li><code>numberOfUnitsPerBox<sub>i</sub></code><sub> </sub>is the number of units in each box of the type <code>i</code>.</li> | ||
| </ul> | ||
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| <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> | ||
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| <p>Return <em>the <strong>maximum</strong> total number of <strong>units</strong> that can be put on the truck.</em></p> | ||
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| <p> </p> | ||
| <p><strong>Example 1:</strong></p> | ||
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| <pre><strong>Input:</strong> boxTypes = [[1,3],[2,2],[3,1]], truckSize = 4 | ||
| <strong>Output:</strong> 8 | ||
| <strong>Explanation:</strong> There are: | ||
| - 1 box of the first type that contains 3 units. | ||
| - 2 boxes of the second type that contain 2 units each. | ||
| - 3 boxes of the third type that contain 1 unit each. | ||
| You can take all the boxes of the first and second types, and one box of the third type. | ||
| The total number of units will be = (1 * 3) + (2 * 2) + (1 * 1) = 8. | ||
| </pre> | ||
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| <p><strong>Example 2:</strong></p> | ||
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| <pre><strong>Input:</strong> boxTypes = [[5,10],[2,5],[4,7],[3,9]], truckSize = 10 | ||
| <strong>Output:</strong> 91 | ||
| </pre> | ||
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| <p> </p> | ||
| <p><strong>Constraints:</strong></p> | ||
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| <ul> | ||
| <li><code>1 <= boxTypes.length <= 1000</code></li> | ||
| <li><code>1 <= numberOfBoxes<sub>i</sub>, numberOfUnitsPerBox<sub>i</sub> <= 1000</code></li> | ||
| <li><code>1 <= truckSize <= 10<sup>6</sup></code></li> | ||
| </ul> | ||
| </div> |