mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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167 lines
15 KiB
JSON
167 lines
15 KiB
JSON
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"questionId": "1146",
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"title": "Greatest Common Divisor of Strings",
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"titleSlug": "greatest-common-divisor-of-strings",
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"content": "<p>For two strings <code>s</code> and <code>t</code>, we say "<code>t</code> divides <code>s</code>" if and only if <code>s = t + ... + t</code> (i.e., <code>t</code> is concatenated with itself one or more times).</p>\n\n<p>Given two strings <code>str1</code> and <code>str2</code>, return <em>the largest string </em><code>x</code><em> such that </em><code>x</code><em> divides both </em><code>str1</code><em> and </em><code>str2</code>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> str1 = "ABCABC", str2 = "ABC"\n<strong>Output:</strong> "ABC"\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> str1 = "ABABAB", str2 = "ABAB"\n<strong>Output:</strong> "AB"\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> str1 = "LEET", str2 = "CODE"\n<strong>Output:</strong> ""\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= str1.length, str2.length <= 1000</code></li>\n\t<li><code>str1</code> and <code>str2</code> consist of English uppercase letters.</li>\n</ul>\n",
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"difficulty": "Easy",
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"exampleTestcases": "\"ABCABC\"\n\"ABC\"\n\"ABABAB\"\n\"ABAB\"\n\"LEET\"\n\"CODE\"",
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"categoryTitle": "Algorithms",
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"code": "class Solution(object):\n def gcdOfStrings(self, str1, str2):\n \"\"\"\n :type str1: str\n :type str2: str\n :rtype: str\n \"\"\"\n ",
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"code": "# @param {String} str1\n# @param {String} str2\n# @return {String}\ndef gcd_of_strings(str1, str2)\n \nend",
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"code": "(define/contract (gcd-of-strings str1 str2)\n (-> string? string? string?)\n\n )",
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"lang": "Erlang",
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"code": "-spec gcd_of_strings(Str1 :: unicode:unicode_binary(), Str2 :: unicode:unicode_binary()) -> unicode:unicode_binary().\ngcd_of_strings(Str1, Str2) ->\n .",
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"code": "defmodule Solution do\n @spec gcd_of_strings(str1 :: String.t, str2 :: String.t) :: String.t\n def gcd_of_strings(str1, str2) do\n\n end\nend",
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"hints": [
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"The greatest common divisor must be a prefix of each string, so we can try all prefixes."
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],
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"solution": null,
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"sampleTestCase": "\"ABCABC\"\n\"ABC\"",
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"metaData": "{\n \"name\": \"gcdOfStrings\",\n \"params\": [\n {\n \"name\": \"str1\",\n \"type\": \"string\"\n },\n {\n \"name\": \"str2\",\n \"type\": \"string\"\n }\n ],\n \"return\": {\n \"type\": \"string\"\n }\n}\n",
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Java 8 features such as lambda expressions and stream API can be used. </p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n<p>Includes <code>Pair</code> class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.</p>\"], \"python\": [\"Python\", \"<p><code>Python 2.7.12</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/2/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/2/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/2/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. 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