mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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186 lines
16 KiB
JSON
186 lines
16 KiB
JSON
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"title": "Maximum Number of Coins You Can Get",
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"content": "<p>There are <code>3n</code> piles of coins of varying size, you and your friends will take piles of coins as follows:</p>\n\n<ul>\n\t<li>In each step, you will choose <strong>any </strong><code>3</code> piles of coins (not necessarily consecutive).</li>\n\t<li>Of your choice, Alice will pick the pile with the maximum number of coins.</li>\n\t<li>You will pick the next pile with the maximum number of coins.</li>\n\t<li>Your friend Bob will pick the last pile.</li>\n\t<li>Repeat until there are no more piles of coins.</li>\n</ul>\n\n<p>Given an array of integers <code>piles</code> where <code>piles[i]</code> is the number of coins in the <code>i<sup>th</sup></code> pile.</p>\n\n<p>Return the maximum number of coins that you can have.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> piles = [2,4,1,2,7,8]\n<strong>Output:</strong> 9\n<strong>Explanation: </strong>Choose the triplet (2, 7, 8), Alice Pick the pile with 8 coins, you the pile with <strong>7</strong> coins and Bob the last one.\nChoose the triplet (1, 2, 4), Alice Pick the pile with 4 coins, you the pile with <strong>2</strong> coins and Bob the last one.\nThe maximum number of coins which you can have are: 7 + 2 = 9.\nOn the other hand if we choose this arrangement (1, <strong>2</strong>, 8), (2, <strong>4</strong>, 7) you only get 2 + 4 = 6 coins which is not optimal.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> piles = [2,4,5]\n<strong>Output:</strong> 4\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> piles = [9,8,7,6,5,1,2,3,4]\n<strong>Output:</strong> 18\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>3 <= piles.length <= 10<sup>5</sup></code></li>\n\t<li><code>piles.length % 3 == 0</code></li>\n\t<li><code>1 <= piles[i] <= 10<sup>4</sup></code></li>\n</ul>\n",
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"Which pile of coins will you never be able to pick up?",
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"Bob is forced to take the last pile of coins, no matter what it is. Which pile should you give to him?"
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