leetcode-problemset/leetcode-cn/originData/remove-covered-intervals.json

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        "question": {
            "questionId": "1222",
            "questionFrontendId": "1288",
            "categoryTitle": "Algorithms",
            "boundTopicId": 53982,
            "title": "Remove Covered Intervals",
            "titleSlug": "remove-covered-intervals",
            "content": "<p>Given an array <code>intervals</code> where <code>intervals[i] = [l<sub>i</sub>, r<sub>i</sub>]</code> represent the interval <code>[l<sub>i</sub>, r<sub>i</sub>)</code>, remove all intervals that are covered by another interval in the list.</p>\n\n<p>The interval <code>[a, b)</code> is covered by the interval <code>[c, d)</code> if and only if <code>c &lt;= a</code> and <code>b &lt;= d</code>.</p>\n\n<p>Return <em>the number of remaining intervals</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> intervals = [[1,4],[3,6],[2,8]]\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> Interval [3,6] is covered by [2,8], therefore it is removed.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> intervals = [[1,4],[2,3]]\n<strong>Output:</strong> 1\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= intervals.length &lt;= 1000</code></li>\n\t<li><code>intervals[i].length == 2</code></li>\n\t<li><code>0 &lt;= l<sub>i</sub> &lt; r<sub>i</sub> &lt;= 10<sup>5</sup></code></li>\n\t<li>All the given intervals are <strong>unique</strong>.</li>\n</ul>\n",
            "translatedTitle": "删除被覆盖区间",
            "translatedContent": "<p>给你一个区间列表，请你删除列表中被其他区间所覆盖的区间。</p>\n\n<p>只有当&nbsp;<code>c &lt;= a</code>&nbsp;且&nbsp;<code>b &lt;= d</code>&nbsp;时，我们才认为区间&nbsp;<code>[a,b)</code> 被区间&nbsp;<code>[c,d)</code> 覆盖。</p>\n\n<p>在完成所有删除操作后，请你返回列表中剩余区间的数目。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例：</strong></p>\n\n<pre>\n<strong>输入：</strong>intervals = [[1,4],[3,6],[2,8]]\n<strong>输出：</strong>2\n<strong>解释：</strong>区间 [3,6] 被区间 [2,8] 覆盖，所以它被删除了。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= intervals.length &lt;= 1000</code></li>\n\t<li><code>0 &lt;= intervals[i][0] &lt;&nbsp;intervals[i][1] &lt;= 10^5</code></li>\n\t<li>对于所有的&nbsp;<code>i != j</code>：<code>intervals[i] != intervals[j]</code></li>\n</ul>\n",
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            "difficulty": "Medium",
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            "topicTags": [
                {
                    "name": "Array",
                    "slug": "array",
                    "translatedName": "数组",
                    "__typename": "TopicTagNode"
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                    "lang": "C++",
                    "langSlug": "cpp",
                    "code": "class Solution {\npublic:\n    int removeCoveredIntervals(vector<vector<int>>& intervals) {\n        \n    }\n};",
                    "__typename": "CodeSnippetNode"
                },
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                    "langSlug": "java",
                    "code": "class Solution {\n    public int removeCoveredIntervals(int[][] intervals) {\n        \n    }\n}",
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                },
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                    "code": "class Solution(object):\n    def removeCoveredIntervals(self, intervals):\n        \"\"\"\n        :type intervals: List[List[int]]\n        :rtype: int\n        \"\"\"\n        ",
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                    "code": "class Solution:\n    def removeCoveredIntervals(self, intervals: List[List[int]]) -> int:\n        ",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "C",
                    "langSlug": "c",
                    "code": "int removeCoveredIntervals(int** intervals, int intervalsSize, int* intervalsColSize) {\n    \n}",
                    "__typename": "CodeSnippetNode"
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                    "lang": "C#",
                    "langSlug": "csharp",
                    "code": "public class Solution {\n    public int RemoveCoveredIntervals(int[][] intervals) {\n        \n    }\n}",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * @param {number[][]} intervals\n * @return {number}\n */\nvar removeCoveredIntervals = function(intervals) {\n    \n};",
                    "__typename": "CodeSnippetNode"
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                    "lang": "TypeScript",
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                    "code": "function removeCoveredIntervals(intervals: number[][]): number {\n    \n};",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "PHP",
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                    "code": "class Solution {\n\n    /**\n     * @param Integer[][] $intervals\n     * @return Integer\n     */\n    function removeCoveredIntervals($intervals) {\n        \n    }\n}",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Swift",
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                    "code": "class Solution {\n    func removeCoveredIntervals(_ intervals: [[Int]]) -> Int {\n        \n    }\n}",
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                    "code": "class Solution {\n    fun removeCoveredIntervals(intervals: Array<IntArray>): Int {\n        \n    }\n}",
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                    "code": "class Solution {\n  int removeCoveredIntervals(List<List<int>> intervals) {\n    \n  }\n}",
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                    "lang": "Go",
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                    "code": "func removeCoveredIntervals(intervals [][]int) int {\n    \n}",
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                    "lang": "Ruby",
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                    "code": "# @param {Integer[][]} intervals\n# @return {Integer}\ndef remove_covered_intervals(intervals)\n    \nend",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Scala",
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                    "code": "object Solution {\n    def removeCoveredIntervals(intervals: Array[Array[Int]]): Int = {\n        \n    }\n}",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Rust",
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                    "code": "impl Solution {\n    pub fn remove_covered_intervals(intervals: Vec<Vec<i32>>) -> i32 {\n        \n    }\n}",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Racket",
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                    "code": "(define/contract (remove-covered-intervals intervals)\n  (-> (listof (listof exact-integer?)) exact-integer?)\n  )",
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                {
                    "lang": "Erlang",
                    "langSlug": "erlang",
                    "code": "-spec remove_covered_intervals(Intervals :: [[integer()]]) -> integer().\nremove_covered_intervals(Intervals) ->\n  .",
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                    "lang": "Elixir",
                    "langSlug": "elixir",
                    "code": "defmodule Solution do\n  @spec remove_covered_intervals(intervals :: [[integer]]) :: integer\n  def remove_covered_intervals(intervals) do\n    \n  end\nend",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Cangjie",
                    "langSlug": "cangjie",
                    "code": "class Solution {\n    func removeCoveredIntervals(intervals: Array<Array<Int64>>): Int64 {\n\n    }\n}",
                    "__typename": "CodeSnippetNode"
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            "hints": [
                "How to check if an interval is covered by another?",
                "Compare each interval to all others and check if it is covered by any interval."
            ],
            "solution": null,
            "status": null,
            "sampleTestCase": "[[1,4],[3,6],[2,8]]",
            "metaData": "{\n  \"name\": \"removeCoveredIntervals\",\n  \"params\": [\n    {\n      \"name\": \"intervals\",\n      \"type\": \"integer[][]\"\n    }\n  ],\n  \"return\": {\n    \"type\": \"integer\"\n  }\n}",
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