mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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162 lines
16 KiB
JSON
162 lines
16 KiB
JSON
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"questionId": "1443",
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"title": "Minimum Distance to Type a Word Using Two Fingers",
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"titleSlug": "minimum-distance-to-type-a-word-using-two-fingers",
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"content": "<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/01/02/leetcode_keyboard.png\" style=\"width: 349px; height: 209px;\" />\n<p>You have a keyboard layout as shown above in the <strong>X-Y</strong> plane, where each English uppercase letter is located at some coordinate.</p>\n\n<ul>\n\t<li>For example, the letter <code>'A'</code> is located at coordinate <code>(0, 0)</code>, the letter <code>'B'</code> is located at coordinate <code>(0, 1)</code>, the letter <code>'P'</code> is located at coordinate <code>(2, 3)</code> and the letter <code>'Z'</code> is located at coordinate <code>(4, 1)</code>.</li>\n</ul>\n\n<p>Given the string <code>word</code>, return <em>the minimum total <strong>distance</strong> to type such string using only two fingers</em>.</p>\n\n<p>The <strong>distance</strong> between coordinates <code>(x<sub>1</sub>, y<sub>1</sub>)</code> and <code>(x<sub>2</sub>, y<sub>2</sub>)</code> is <code>|x<sub>1</sub> - x<sub>2</sub>| + |y<sub>1</sub> - y<sub>2</sub>|</code>.</p>\n\n<p><strong>Note</strong> that the initial positions of your two fingers are considered free so do not count towards your total distance, also your two fingers do not have to start at the first letter or the first two letters.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> word = "CAKE"\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> Using two fingers, one optimal way to type "CAKE" is: \nFinger 1 on letter 'C' -> cost = 0 \nFinger 1 on letter 'A' -> cost = Distance from letter 'C' to letter 'A' = 2 \nFinger 2 on letter 'K' -> cost = 0 \nFinger 2 on letter 'E' -> cost = Distance from letter 'K' to letter 'E' = 1 \nTotal distance = 3\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> word = "HAPPY"\n<strong>Output:</strong> 6\n<strong>Explanation:</strong> Using two fingers, one optimal way to type "HAPPY" is:\nFinger 1 on letter 'H' -> cost = 0\nFinger 1 on letter 'A' -> cost = Distance from letter 'H' to letter 'A' = 2\nFinger 2 on letter 'P' -> cost = 0\nFinger 2 on letter 'P' -> cost = Distance from letter 'P' to letter 'P' = 0\nFinger 1 on letter 'Y' -> cost = Distance from letter 'A' to letter 'Y' = 4\nTotal distance = 6\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 <= word.length <= 300</code></li>\n\t<li><code>word</code> consists of uppercase English letters.</li>\n</ul>\n",
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"exampleTestcases": "\"CAKE\"\n\"HAPPY\"",
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"code": "# @param {String} word\n# @return {Integer}\ndef minimum_distance(word)\n \nend",
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"code": "-spec minimum_distance(Word :: unicode:unicode_binary()) -> integer().\nminimum_distance(Word) ->\n .",
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"code": "defmodule Solution do\n @spec minimum_distance(word :: String.t) :: integer\n def minimum_distance(word) do\n\n end\nend",
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"hints": [
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"Use dynamic programming.",
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"dp[i][j][k]: smallest movements when you have one finger on i-th char and the other one on j-th char already having written k first characters from word."
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"sampleTestCase": "\"CAKE\"",
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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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