"content":"<p>Given an <strong>empty</strong> set of intervals, implement a data structure that can:</p>\n\n<ul>\n\t<li><strong>Add</strong> an interval to the set of intervals.</li>\n\t<li><strong>Count</strong> the number of integers that are present in <strong>at least one</strong> interval.</li>\n</ul>\n\n<p>Implement the <code>CountIntervals</code> class:</p>\n\n<ul>\n\t<li><code>CountIntervals()</code> Initializes the object with an empty set of intervals.</li>\n\t<li><code>void add(int left, int right)</code> Adds the interval <code>[left, right]</code> to the set of intervals.</li>\n\t<li><code>int count()</code> Returns the number of integers that are present in <strong>at least one</strong> interval.</li>\n</ul>\n\n<p><strong>Note</strong> that an interval <code>[left, right]</code> denotes all the integers <code>x</code> where <code>left <= x <= right</code>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["CountIntervals", "add", "add", "count", "add", "count"]\n[[], [2, 3], [7, 10], [], [5, 8], []]\n<strong>Output</strong>\n[null, null, null, 6, null, 8]\n\n<strong>Explanation</strong>\nCountIntervals countIntervals = new CountIntervals(); // initialize the object with an empty set of intervals. \ncountIntervals.add(2, 3); // add [2, 3] to the set of intervals.\ncountIntervals.add(7, 10); // add [7, 10] to the set of intervals.\ncountIntervals.count(); // return 6\n // the integers 2 and 3 are present in the interval [2, 3].\n // the integers 7, 8, 9, and 10 are present in the interval [7, 10].\ncountIntervals.add(5, 8); // add [5, 8] to the set of intervals.\ncountIntervals.count(); // return 8\n // the integers 2 and 3 are present in the interval [2, 3].\n // the integers 5 and 6 are present in the interval [5, 8].\n // the integers 7 and 8 are present in the intervals [5, 8] and [7, 10].\n // the integers 9 and 10 are present in the interval [7, 10].\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= left <= right <= 10<sup>9</sup></code></li>\n\t<li>At most <code>10<sup>5</sup></code> calls <strong>in total</strong> will be made to <code>add</code> and <code>count</code>.</li>\n\t<li>At least <strong>one</strong> call will be made to <code>count</code>.</li>\n</ul>\n",
"code":"class CountIntervals {\npublic:\n CountIntervals() {\n \n }\n \n void add(int left, int right) {\n \n }\n \n int count() {\n \n }\n};\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * CountIntervals* obj = new CountIntervals();\n * obj->add(left,right);\n * int param_2 = obj->count();\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Java",
"langSlug":"java",
"code":"class CountIntervals {\n\n public CountIntervals() {\n \n }\n \n public void add(int left, int right) {\n \n }\n \n public int count() {\n \n }\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * CountIntervals obj = new CountIntervals();\n * obj.add(left,right);\n * int param_2 = obj.count();\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python",
"langSlug":"python",
"code":"class CountIntervals(object):\n\n def __init__(self):\n \n\n def add(self, left, right):\n \"\"\"\n :type left: int\n :type right: int\n :rtype: None\n \"\"\"\n \n\n def count(self):\n \"\"\"\n :rtype: int\n \"\"\"\n \n\n\n# Your CountIntervals object will be instantiated and called as such:\n# obj = CountIntervals()\n# obj.add(left,right)\n# param_2 = obj.count()",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python3",
"langSlug":"python3",
"code":"class CountIntervals:\n\n def __init__(self):\n \n\n def add(self, left: int, right: int) -> None:\n \n\n def count(self) -> int:\n \n\n\n# Your CountIntervals object will be instantiated and called as such:\n# obj = CountIntervals()\n# obj.add(left,right)\n# param_2 = obj.count()",
"code":"public class CountIntervals {\n\n public CountIntervals() {\n \n }\n \n public void Add(int left, int right) {\n \n }\n \n public int Count() {\n \n }\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * CountIntervals obj = new CountIntervals();\n * obj.Add(left,right);\n * int param_2 = obj.Count();\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"JavaScript",
"langSlug":"javascript",
"code":"\nvar CountIntervals = function() {\n \n};\n\n/** \n * @param {number} left \n * @param {number} right\n * @return {void}\n */\nCountIntervals.prototype.add = function(left, right) {\n \n};\n\n/**\n * @return {number}\n */\nCountIntervals.prototype.count = function() {\n \n};\n\n/** \n * Your CountIntervals object will be instantiated and called as such:\n * var obj = new CountIntervals()\n * obj.add(left,right)\n * var param_2 = obj.count()\n */",
"code":"class CountIntervals {\n constructor() {\n \n }\n\n add(left: number, right: number): void {\n \n }\n\n count(): number {\n \n }\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * var obj = new CountIntervals()\n * obj.add(left,right)\n * var param_2 = obj.count()\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"PHP",
"langSlug":"php",
"code":"class CountIntervals {\n /**\n */\n function __construct() {\n \n }\n \n /**\n * @param Integer $left\n * @param Integer $right\n * @return NULL\n */\n function add($left, $right) {\n \n }\n \n /**\n * @return Integer\n */\n function count() {\n \n }\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * $obj = CountIntervals();\n * $obj->add($left, $right);\n * $ret_2 = $obj->count();\n */",
"code":"class CountIntervals() {\n\n fun add(left: Int, right: Int) {\n \n }\n\n fun count(): Int {\n \n }\n\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * var obj = CountIntervals()\n * obj.add(left,right)\n * var param_2 = obj.count()\n */",
"code":"class CountIntervals() {\n\n def add(left: Int, right: Int) {\n \n }\n\n def count(): Int = {\n \n }\n\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * var obj = new CountIntervals()\n * obj.add(left,right)\n * var param_2 = obj.count()\n */",
"code":"struct CountIntervals {\n\n}\n\n\n/** \n * `&self` means the method takes an immutable reference.\n * If you need a mutable reference, change it to `&mut self` instead.\n */\nimpl CountIntervals {\n\n fn new() -> Self {\n \n }\n \n fn add(&self, left: i32, right: i32) {\n \n }\n \n fn count(&self) -> i32 {\n \n }\n}\n\n/**\n * Your CountIntervals object will be instantiated and called as such:\n * let obj = CountIntervals::new();\n * obj.add(left, right);\n * let ret_2: i32 = obj.count();\n */",
"code":"-spec count_intervals_init_() -> any().\ncount_intervals_init_() ->\n .\n\n-spec count_intervals_add(Left :: integer(), Right :: integer()) -> any().\ncount_intervals_add(Left, Right) ->\n .\n\n-spec count_intervals_count() -> integer().\ncount_intervals_count() ->\n .\n\n\n%% Your functions will be called as such:\n%% count_intervals_init_(),\n%% count_intervals_add(Left, Right),\n%% Param_2 = count_intervals_count(),\n\n%% count_intervals_init_ will be called before every test case, in which you can do some necessary initializations.",
"code":"defmodule CountIntervals do\n @spec init_() :: any\n def init_() do\n \n end\n\n @spec add(left :: integer, right :: integer) :: any\n def add(left, right) do\n \n end\n\n @spec count() :: integer\n def count() do\n \n end\nend\n\n# Your functions will be called as such:\n# CountIntervals.init_()\n# CountIntervals.add(left, right)\n# param_2 = CountIntervals.count()\n\n# CountIntervals.init_ will be called before every test case, in which you can do some necessary initializations.",
"How can you efficiently add intervals to the set of intervals? Can a data structure like a Binary Search Tree help?",
"How can you ensure that the intervals present in the set are non-overlapping? Try merging the overlapping intervals whenever a new interval is added.",
"How can you update the count of integers present in at least one interval when a new interval is added to the set?"
"envInfo":"{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 20 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level two optimization (<code>-O2</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\"], \"java\": [\"Java\", \"<p><code>OpenJDK 17</code>. 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>. If you need more libraries, you can import it yourself.</p>\\r\\n\\r\\n<p>For Map/TreeMap data structure, you may use <a href=\\\"http://www.grantjenks.com/docs/sortedcontainers/\\\" target=\\\"_blank\\\">sortedcontainers</a> library.</p>\\r\\n\\r\\n<p>Note that Python 2.7 <a href=\\\"https://www.python.org/dev/peps/pep-0373/\\\" target=\\\"_blank\\\">will not be maintained past 2020</a>. For the latest Python, please choose Python3 instead.</p>\"], \"c\": [\"C\", \"<p>Compiled with <code>gcc 8.2</code> using the gnu11 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level one optimization (<code>-O1</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n\\r\\n<p>For hash table operations, you may use <a href=\\\"https://troydhanson.github.io/uthash/\\\" target=\\\"_blank\\\">uthash</a>. \\\"uthash.h\\\" is included by default. Below are some examples:</p>\\r\\n\\r\\n<p><b>1. Adding an item to a hash.</b>\\r\\n<pre>\\r\\nstruct hash_entry {\\r\\n int id; /* we'll use this field as the key */\\r\\n char name[10];\\r\\n UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>2. Looking up an item in a hash:</b>\\r\\n<pre>\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>3. Deleting an item in a hash:</b>\\r\\n<pre>\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n</pre>\\r\\n</p>\"], \"csharp\": [\"C#\", \"<p><a href=\\\"https://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></p>\"], \"javascript\": [\"JavaScript\", \"<p><code>Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use 5.3.0 version of <a href=\\\"https://github.com/datastructures-js/priority-queue/tree/fb4fdb984834421279aeb081df7af624d17c2a03\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and 4.2.1 version of <a href=\\\"https://githu
