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 Events That Can Be Attended",
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"content": "<p>You are given an array of <code>events</code> where <code>events[i] = [startDay<sub>i</sub>, endDay<sub>i</sub>]</code>. Every event <code>i</code> starts at <code>startDay<sub>i</sub></code><sub> </sub>and ends at <code>endDay<sub>i</sub></code>.</p>\n\n<p>You can attend an event <code>i</code> at any day <code>d</code> where <code>startTime<sub>i</sub> <= d <= endTime<sub>i</sub></code>. You can only attend one event at any time <code>d</code>.</p>\n\n<p>Return <em>the maximum number of events you can attend</em>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/02/05/e1.png\" style=\"width: 400px; height: 267px;\" />\n<pre>\n<strong>Input:</strong> events = [[1,2],[2,3],[3,4]]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> You can attend all the three events.\nOne way to attend them all is as shown.\nAttend the first event on day 1.\nAttend the second event on day 2.\nAttend the third event on day 3.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> events= [[1,2],[2,3],[3,4],[1,2]]\n<strong>Output:</strong> 4\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= events.length <= 10<sup>5</sup></code></li>\n\t<li><code>events[i].length == 2</code></li>\n\t<li><code>1 <= startDay<sub>i</sub> <= endDay<sub>i</sub> <= 10<sup>5</sup></code></li>\n</ul>\n",
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"exampleTestcases": "[[1,2],[2,3],[3,4]]\n[[1,2],[2,3],[3,4],[1,2]]",
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"categoryTitle": "Algorithms",
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"code": "class Solution(object):\n def maxEvents(self, events):\n \"\"\"\n :type events: List[List[int]]\n :rtype: int\n \"\"\"\n ",
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"code": "# @param {Integer[][]} events\n# @return {Integer}\ndef max_events(events)\n \nend",
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"code": "object Solution {\n def maxEvents(events: Array[Array[Int]]): Int = {\n \n }\n}",
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"code": "impl Solution {\n pub fn max_events(events: Vec<Vec<i32>>) -> i32 {\n \n }\n}",
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"code": "(define/contract (max-events events)\n (-> (listof (listof exact-integer?)) exact-integer?)\n )",
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"lang": "Erlang",
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"code": "-spec max_events(Events :: [[integer()]]) -> integer().\nmax_events(Events) ->\n .",
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"hints": [
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"Sort the events by the start time and in case of tie by the end time in ascending order.",
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"Loop over the sorted events. Attend as much as you can and keep the last day occupied. When you try to attend new event keep in mind the first day you can attend a new event in."
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],
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"sampleTestCase": "[[1,2],[2,3],[3,4]]",
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