mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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176 lines
15 KiB
JSON
176 lines
15 KiB
JSON
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"title": "Largest Multiple of Three",
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"content": "<p>Given an array of digits <code>digits</code>, return <em>the largest multiple of <strong>three</strong> that can be formed by concatenating some of the given digits in <strong>any order</strong></em>. If there is no answer return an empty string.</p>\n\n<p>Since the answer may not fit in an integer data type, return the answer as a string. Note that the returning answer must not contain unnecessary leading zeros.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> digits = [8,1,9]\n<strong>Output:</strong> "981"\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> digits = [8,6,7,1,0]\n<strong>Output:</strong> "8760"\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> digits = [1]\n<strong>Output:</strong> ""\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= digits.length <= 10<sup>4</sup></code></li>\n\t<li><code>0 <= digits[i] <= 9</code></li>\n</ul>\n",
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"difficulty": "Hard",
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"code": "class Solution(object):\n def largestMultipleOfThree(self, digits):\n \"\"\"\n :type digits: List[int]\n :rtype: str\n \"\"\"\n ",
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"code": "(define/contract (largest-multiple-of-three digits)\n (-> (listof exact-integer?) string?)\n\n )",
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"lang": "Erlang",
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"code": "-spec largest_multiple_of_three(Digits :: [integer()]) -> unicode:unicode_binary().\nlargest_multiple_of_three(Digits) ->\n .",
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"code": "defmodule Solution do\n @spec largest_multiple_of_three(digits :: [integer]) :: String.t\n def largest_multiple_of_three(digits) do\n\n end\nend",
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"hints": [
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"A number is a multiple of three if and only if its sum of digits is a multiple of three.",
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"Use dynamic programming.",
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"To find the maximum number, try to maximize the number of digits of the number.",
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"Sort the digits in descending order to find the maximum number."
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],
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"solution": null,
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"status": null,
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"sampleTestCase": "[8,1,9]",
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