mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-10 18:48:13 +08:00
186 lines
18 KiB
JSON
186 lines
18 KiB
JSON
{
|
||
"data": {
|
||
"question": {
|
||
"questionId": "1802",
|
||
"questionFrontendId": "1700",
|
||
"boundTopicId": null,
|
||
"title": "Number of Students Unable to Eat Lunch",
|
||
"titleSlug": "number-of-students-unable-to-eat-lunch",
|
||
"content": "<p>The school cafeteria offers circular and square sandwiches at lunch break, referred to by numbers <code>0</code> and <code>1</code> respectively. All students stand in a queue. Each student either prefers square or circular sandwiches.</p>\n\n<p>The number of sandwiches in the cafeteria is equal to the number of students. The sandwiches are placed in a <strong>stack</strong>. At each step:</p>\n\n<ul>\n\t<li>If the student at the front of the queue <strong>prefers</strong> the sandwich on the top of the stack, they will <strong>take it</strong> and leave the queue.</li>\n\t<li>Otherwise, they will <strong>leave it</strong> and go to the queue's end.</li>\n</ul>\n\n<p>This continues until none of the queue students want to take the top sandwich and are thus unable to eat.</p>\n\n<p>You are given two integer arrays <code>students</code> and <code>sandwiches</code> where <code>sandwiches[i]</code> is the type of the <code>i<sup>th</sup></code> sandwich in the stack (<code>i = 0</code> is the top of the stack) and <code>students[j]</code> is the preference of the <code>j<sup>th</sup></code> student in the initial queue (<code>j = 0</code> is the front of the queue). Return <em>the number of students that are unable to eat.</em></p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> students = [1,1,0,0], sandwiches = [0,1,0,1]\n<strong>Output:</strong> 0<strong> \nExplanation:</strong>\n- Front student leaves the top sandwich and returns to the end of the line making students = [1,0,0,1].\n- Front student leaves the top sandwich and returns to the end of the line making students = [0,0,1,1].\n- Front student takes the top sandwich and leaves the line making students = [0,1,1] and sandwiches = [1,0,1].\n- Front student leaves the top sandwich and returns to the end of the line making students = [1,1,0].\n- Front student takes the top sandwich and leaves the line making students = [1,0] and sandwiches = [0,1].\n- Front student leaves the top sandwich and returns to the end of the line making students = [0,1].\n- Front student takes the top sandwich and leaves the line making students = [1] and sandwiches = [1].\n- Front student takes the top sandwich and leaves the line making students = [] and sandwiches = [].\nHence all students are able to eat.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> students = [1,1,1,0,0,1], sandwiches = [1,0,0,0,1,1]\n<strong>Output:</strong> 3\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= students.length, sandwiches.length <= 100</code></li>\n\t<li><code>students.length == sandwiches.length</code></li>\n\t<li><code>sandwiches[i]</code> is <code>0</code> or <code>1</code>.</li>\n\t<li><code>students[i]</code> is <code>0</code> or <code>1</code>.</li>\n</ul>\n",
|
||
"translatedTitle": null,
|
||
"translatedContent": null,
|
||
"isPaidOnly": false,
|
||
"difficulty": "Easy",
|
||
"likes": 1581,
|
||
"dislikes": 114,
|
||
"isLiked": null,
|
||
"similarQuestions": "[{\"title\": \"Time Needed to Buy Tickets\", \"titleSlug\": \"time-needed-to-buy-tickets\", \"difficulty\": \"Easy\", \"translatedTitle\": null}]",
|
||
"exampleTestcases": "[1,1,0,0]\n[0,1,0,1]\n[1,1,1,0,0,1]\n[1,0,0,0,1,1]",
|
||
"categoryTitle": "Algorithms",
|
||
"contributors": [],
|
||
"topicTags": [
|
||
{
|
||
"name": "Array",
|
||
"slug": "array",
|
||
"translatedName": null,
|
||
"__typename": "TopicTagNode"
|
||
},
|
||
{
|
||
"name": "Stack",
|
||
"slug": "stack",
|
||
"translatedName": null,
|
||
"__typename": "TopicTagNode"
|
||
},
|
||
{
|
||
"name": "Queue",
|
||
"slug": "queue",
|
||
"translatedName": null,
|
||
"__typename": "TopicTagNode"
|
||
},
|
||
{
|
||
"name": "Simulation",
|
||
"slug": "simulation",
|
||
"translatedName": null,
|
||
"__typename": "TopicTagNode"
|
||
}
|
||
],
|
||
"companyTagStats": null,
|
||
"codeSnippets": [
|
||
{
|
||
"lang": "C++",
|
||
"langSlug": "cpp",
|
||
"code": "class Solution {\npublic:\n int countStudents(vector<int>& students, vector<int>& sandwiches) {\n \n }\n};",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Java",
|
||
"langSlug": "java",
|
||
"code": "class Solution {\n public int countStudents(int[] students, int[] sandwiches) {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Python",
|
||
"langSlug": "python",
|
||
"code": "class Solution(object):\n def countStudents(self, students, sandwiches):\n \"\"\"\n :type students: List[int]\n :type sandwiches: List[int]\n :rtype: int\n \"\"\"\n ",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Python3",
|
||
"langSlug": "python3",
|
||
"code": "class Solution:\n def countStudents(self, students: List[int], sandwiches: List[int]) -> int:\n ",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "C",
|
||
"langSlug": "c",
|
||
"code": "int countStudents(int* students, int studentsSize, int* sandwiches, int sandwichesSize) {\n \n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "C#",
|
||
"langSlug": "csharp",
|
||
"code": "public class Solution {\n public int CountStudents(int[] students, int[] sandwiches) {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "JavaScript",
|
||
"langSlug": "javascript",
|
||
"code": "/**\n * @param {number[]} students\n * @param {number[]} sandwiches\n * @return {number}\n */\nvar countStudents = function(students, sandwiches) {\n \n};",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "TypeScript",
|
||
"langSlug": "typescript",
|
||
"code": "function countStudents(students: number[], sandwiches: number[]): number {\n \n};",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "PHP",
|
||
"langSlug": "php",
|
||
"code": "class Solution {\n\n /**\n * @param Integer[] $students\n * @param Integer[] $sandwiches\n * @return Integer\n */\n function countStudents($students, $sandwiches) {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Swift",
|
||
"langSlug": "swift",
|
||
"code": "class Solution {\n func countStudents(_ students: [Int], _ sandwiches: [Int]) -> Int {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Kotlin",
|
||
"langSlug": "kotlin",
|
||
"code": "class Solution {\n fun countStudents(students: IntArray, sandwiches: IntArray): Int {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Dart",
|
||
"langSlug": "dart",
|
||
"code": "class Solution {\n int countStudents(List<int> students, List<int> sandwiches) {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Go",
|
||
"langSlug": "golang",
|
||
"code": "func countStudents(students []int, sandwiches []int) int {\n \n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Ruby",
|
||
"langSlug": "ruby",
|
||
"code": "# @param {Integer[]} students\n# @param {Integer[]} sandwiches\n# @return {Integer}\ndef count_students(students, sandwiches)\n \nend",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Scala",
|
||
"langSlug": "scala",
|
||
"code": "object Solution {\n def countStudents(students: Array[Int], sandwiches: Array[Int]): Int = {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Rust",
|
||
"langSlug": "rust",
|
||
"code": "impl Solution {\n pub fn count_students(students: Vec<i32>, sandwiches: Vec<i32>) -> i32 {\n \n }\n}",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Racket",
|
||
"langSlug": "racket",
|
||
"code": "(define/contract (count-students students sandwiches)\n (-> (listof exact-integer?) (listof exact-integer?) exact-integer?)\n )",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Erlang",
|
||
"langSlug": "erlang",
|
||
"code": "-spec count_students(Students :: [integer()], Sandwiches :: [integer()]) -> integer().\ncount_students(Students, Sandwiches) ->\n .",
|
||
"__typename": "CodeSnippetNode"
|
||
},
|
||
{
|
||
"lang": "Elixir",
|
||
"langSlug": "elixir",
|
||
"code": "defmodule Solution do\n @spec count_students(students :: [integer], sandwiches :: [integer]) :: integer\n def count_students(students, sandwiches) do\n \n end\nend",
|
||
"__typename": "CodeSnippetNode"
|
||
}
|
||
],
|
||
"stats": "{\"totalAccepted\": \"87.1K\", \"totalSubmission\": \"123.8K\", \"totalAcceptedRaw\": 87129, \"totalSubmissionRaw\": 123798, \"acRate\": \"70.4%\"}",
|
||
"hints": [
|
||
"Simulate the given in the statement",
|
||
"Calculate those who will eat instead of those who will not."
|
||
],
|
||
"solution": null,
|
||
"status": null,
|
||
"sampleTestCase": "[1,1,0,0]\n[0,1,0,1]",
|
||
"metaData": "{\n \"name\": \"countStudents\",\n \"params\": [\n {\n \"name\": \"students\",\n \"type\": \"integer[]\"\n },\n {\n \"type\": \"integer[]\",\n \"name\": \"sandwiches\"\n }\n ],\n \"return\": {\n \"type\": \"integer\"\n }\n}",
|
||
"judgerAvailable": true,
|
||
"judgeType": "large",
|
||
"mysqlSchemas": [],
|
||
"enableRunCode": true,
|
||
"enableTestMode": false,
|
||
"enableDebugger": true,
|
||
"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://github.com/datastructures-js/queue/tree/e63563025a5a805aa16928cb53bcd517bfea9230\\\" target=\\\"_blank\\\">datastructures-js/queue</a>.</p>\"], \"ruby\": [\"Ruby\", \"<p><code>Ruby 3.1</code></p>\\r\\n\\r\\n<p>Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms</p>\"], \"swift\": [\"Swift\", \"<p><code>Swift 5.5.2</code>.</p>\"], \"golang\": [\"Go\", \"<p><code>Go 1.21</code></p>\\r\\n<p>Support <a href=\\\"https://github.com/emirpasic/gods/tree/v1.18.1\\\" target=\\\"_blank\\\">https://godoc.org/github.com/emirpasic/gods@v1.18.1</a> library.</p>\"], \"python3\": [\"Python3\", \"<p><code>Python 3.10</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/3/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/3/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/3/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>\"], \"scala\": [\"Scala\", \"<p><code>Scala 2.13.7</code>.</p>\"], \"kotlin\": [\"Kotlin\", \"<p><code>Kotlin 1.9.0</code>.</p>\"], \"rust\": [\"Rust\", \"<p><code>Rust 1.58.1</code></p>\\r\\n\\r\\n<p>Supports <a href=\\\"https://crates.io/crates/rand\\\" target=\\\"_blank\\\">rand </a> v0.6\\u00a0from crates.io</p>\"], \"php\": [\"PHP\", \"<p><code>PHP 8.1</code>.</p>\\r\\n<p>With bcmath module</p>\"], \"typescript\": [\"Typescript\", \"<p><code>TypeScript 5.1.6, 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 ES2022 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\"], \"racket\": [\"Racket\", \"<p>Run with <code>Racket 8.3</code>.</p>\"], \"erlang\": [\"Erlang\", \"Erlang/OTP 25.0\"], \"elixir\": [\"Elixir\", \"Elixir 1.13.4 with Erlang/OTP 25.0\"], \"dart\": [\"Dart\", \"<p>Dart 2.17.3</p>\\r\\n\\r\\n<p>Your code will be run directly without compiling</p>\"]}",
|
||
"libraryUrl": null,
|
||
"adminUrl": null,
|
||
"challengeQuestion": null,
|
||
"__typename": "QuestionNode"
|
||
}
|
||
}
|
||
} |