{ "data": { "question": { "questionId": "1393", "questionFrontendId": "2218", "boundTopicId": null, "title": "Maximum Value of K Coins From Piles", "titleSlug": "maximum-value-of-k-coins-from-piles", "content": "

There are n piles of coins on a table. Each pile consists of a positive number of coins of assorted denominations.

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In one move, you can choose any coin on top of any pile, remove it, and add it to your wallet.

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Given a list piles, where piles[i] is a list of integers denoting the composition of the ith pile from top to bottom, and a positive integer k, return the maximum total value of coins you can have in your wallet if you choose exactly k coins optimally.

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Example 1:

\n\"\"\n
\nInput: piles = [[1,100,3],[7,8,9]], k = 2\nOutput: 101\nExplanation:\nThe above diagram shows the different ways we can choose k coins.\nThe maximum total we can obtain is 101.\n
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Example 2:

\n\n
\nInput: piles = [[100],[100],[100],[100],[100],[100],[1,1,1,1,1,1,700]], k = 7\nOutput: 706\nExplanation:\nThe maximum total can be obtained if we choose all coins from the last pile.\n
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Constraints:

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