mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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181 lines
17 KiB
JSON
181 lines
17 KiB
JSON
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"title": "Maximum Number of Darts Inside of a Circular Dartboard",
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"content": "<p>Alice is throwing <code>n</code> darts on a very large wall. You are given an array <code>darts</code> where <code>darts[i] = [x<sub>i</sub>, y<sub>i</sub>]</code> is the position of the <code>i<sup>th</sup></code> dart that Alice threw on the wall.</p>\n\n<p>Bob knows the positions of the <code>n</code> darts on the wall. He wants to place a dartboard of radius <code>r</code> on the wall so that the maximum number of darts that Alice throws lie on the dartboard.</p>\n\n<p>Given the integer <code>r</code>, return <em>the maximum number of darts that can lie on the dartboard</em>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/04/29/sample_1_1806.png\" style=\"width: 248px; height: 211px;\" />\n<pre>\n<strong>Input:</strong> darts = [[-2,0],[2,0],[0,2],[0,-2]], r = 2\n<strong>Output:</strong> 4\n<strong>Explanation:</strong> Circle dartboard with center in (0,0) and radius = 2 contain all points.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/04/29/sample_2_1806.png\" style=\"width: 306px; height: 244px;\" />\n<pre>\n<strong>Input:</strong> darts = [[-3,0],[3,0],[2,6],[5,4],[0,9],[7,8]], r = 5\n<strong>Output:</strong> 5\n<strong>Explanation:</strong> Circle dartboard with center in (0,4) and radius = 5 contain all points except the point (7,8).\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= darts.length <= 100</code></li>\n\t<li><code>darts[i].length == 2</code></li>\n\t<li><code>-10<sup>4</sup> <= x<sub>i</sub>, y<sub>i</sub> <= 10<sup>4</sup></code></li>\n\t<li>All the <code>darts</code> are unique</li>\n\t<li><code>1 <= r <= 5000</code></li>\n</ul>\n",
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"code": "# @param {Integer[][]} darts\n# @param {Integer} r\n# @return {Integer}\ndef num_points(darts, r)\n \nend",
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"code": "impl Solution {\n pub fn num_points(darts: Vec<Vec<i32>>, r: i32) -> i32 {\n \n }\n}",
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"code": "(define/contract (num-points darts r)\n (-> (listof (listof exact-integer?)) exact-integer? exact-integer?)\n )",
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"code": "-spec num_points(Darts :: [[integer()]], R :: integer()) -> integer().\nnum_points(Darts, R) ->\n .",
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"code": "defmodule Solution do\n @spec num_points(darts :: [[integer]], r :: integer) :: integer\n def num_points(darts, r) do\n \n end\nend",
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"If there is an optimal solution, you can always move the circle so that two points lie on the boundary of the circle.",
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"When the radius is fixed, you can find either 0 or 1 or 2 circles that pass two given points at the same time.",
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"Loop for each pair of points and find the center of the circle, after that count the number of points inside the circle."
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