{ "data": { "question": { "questionId": "1185", "questionFrontendId": "1095", "boundTopicId": null, "title": "Find in Mountain Array", "titleSlug": "find-in-mountain-array", "content": "

(This problem is an interactive problem.)

\n\n

You may recall that an array arr is a mountain array if and only if:

\n\n\n\n

Given a mountain array mountainArr, return the minimum index such that mountainArr.get(index) == target. If such an index does not exist, return -1.

\n\n

You cannot access the mountain array directly. You may only access the array using a MountainArray interface:

\n\n\n\n

Submissions making more than 100 calls to MountainArray.get will be judged Wrong Answer. Also, any solutions that attempt to circumvent the judge will result in disqualification.

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Example 1:

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\nInput: array = [1,2,3,4,5,3,1], target = 3\nOutput: 2\nExplanation: 3 exists in the array, at index=2 and index=5. Return the minimum index, which is 2.
\n\n

Example 2:

\n\n
\nInput: array = [0,1,2,4,2,1], target = 3\nOutput: -1\nExplanation: 3 does not exist in the array, so we return -1.\n
\n\n

 

\n

Constraints:

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}, { "name": "Interactive", "slug": "interactive", "translatedName": null, "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "C++", "langSlug": "cpp", "code": "/**\n * // This is the MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * class MountainArray {\n * public:\n * int get(int index);\n * int length();\n * };\n */\n\nclass Solution {\npublic:\n int findInMountainArray(int target, MountainArray &mountainArr) {\n \n }\n};", "__typename": "CodeSnippetNode" }, { "lang": "Java", "langSlug": "java", "code": "/**\n * // This is MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * interface MountainArray {\n * public int get(int index) {}\n * public int length() {}\n * }\n */\n \nclass Solution {\n public int findInMountainArray(int target, MountainArray mountainArr) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "# \"\"\"\n# This is MountainArray's API interface.\n# You should not implement it, or speculate about its implementation\n# \"\"\"\n#class MountainArray(object):\n# def get(self, index):\n# \"\"\"\n# :type index: int\n# :rtype int\n# \"\"\"\n#\n# def length(self):\n# \"\"\"\n# :rtype int\n# \"\"\"\n\nclass Solution(object):\n def findInMountainArray(self, target, mountain_arr):\n \"\"\"\n :type target: integer\n :type mountain_arr: MountainArray\n :rtype: integer\n \"\"\"\n ", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "# \"\"\"\n# This is MountainArray's API interface.\n# You should not implement it, or speculate about its implementation\n# \"\"\"\n#class MountainArray:\n# def get(self, index: int) -> int:\n# def length(self) -> int:\n\nclass Solution:\n def findInMountainArray(self, target: int, mountain_arr: 'MountainArray') -> int:\n ", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "/**\n * *********************************************************************\n * // This is the MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * *********************************************************************\n *\n * int get(MountainArray *, int index);\n * int length(MountainArray *);\n */\n\nint findInMountainArray(int target, MountainArray* mountainArr) {\n\t\n}", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "/**\n * // This is MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * class MountainArray {\n * public int Get(int index) {}\n * public int Length() {}\n * }\n */\n\nclass Solution {\n public int FindInMountainArray(int target, MountainArray mountainArr) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * // This is the MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * function MountainArray() {\n * @param {number} index\n * @return {number}\n * this.get = function(index) {\n * ...\n * };\n *\n * @return {number}\n * this.length = function() {\n * ...\n * };\n * };\n */\n\n/**\n * @param {number} target\n * @param {MountainArray} mountainArr\n * @return {number}\n */\nvar findInMountainArray = function(target, mountainArr) {\n \n};", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "/**\n * // This is the MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * class Master {\n * get(index: number): number {}\n *\n * length(): number {}\n * }\n */\n\nfunction findInMountainArray(target: number, mountainArr: MountainArray) {\n\t\n};", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "/**\n * // This is MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * class MountainArray {\n * function get($index) {}\n * function length() {}\n * }\n */\n\nclass Solution {\n /**\n * @param Integer $target\n * @param MountainArray $mountainArr\n * @return Integer\n */\n function findInMountainArray($target, $mountainArr) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "/**\n * // This is MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * interface MountainArray {\n * public func get(_ index: Int) -> Int {}\n * public func length() -> Int {}\n * }\n */\n\nclass Solution {\n func findInMountainArray(_ target: Int, _ mountainArr: MountainArray) -> Int {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "/**\n * // This is MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * class MountainArray {\n * fun get(index: Int): Int {}\n * fun length(): Int {}\n * }\n */\n\nclass Solution {\n fun findInMountainArray(target: Int, mountainArr: MountainArray): Int {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "/**\n * // This is the MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * type MountainArray struct {\n * }\n *\n * func (this *MountainArray) get(index int) int {}\n * func (this *MountainArray) length() int {}\n */\n\nfunc findInMountainArray(target int, mountainArr *MountainArray) int {\n \n}", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "# This is MountainArray's API interface.\n# You should not implement it, or speculate about its implementation\n# class MountainArray\n# def get(index):\n# \n# end\n#\n# def length()\n#\t\t\n#\t end\n# end\n\n# @param {int} int\n# @param {MountainArray} mountain_arr\n# @return {int}\ndef findInMountainArray(target, mountain_arr)\n \nend", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "/**\n * // This is MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * class MountainArray {\n * def get(index: Int): Int = {}\n * def length(): Int = {}\n * }\n */\n\nobject Solution {\n def findInMountainArray(value: Int, mountainArr: MountainArray): Int = {\n \n\t}\n}", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "/**\n * // This is the MountainArray's API interface.\n * // You should not implement it, or speculate about its implementation\n * struct MountainArray;\n * impl MountainArray {\n * fn get(index:i32)->i32;\n * fn length()->i32;\n * };\n */\n\nimpl Solution {\n pub fn find_in_mountain_array(target: i32, mountain_arr: &MountainArray) -> i32 {\n \n }\n}", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"128.2K\", 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We can binary search to find the peak.\r\nAfter finding the peak, we can binary search two more times to find whether the value occurs on either side of the peak." ], "solution": { "id": "2079", "canSeeDetail": true, "paidOnly": false, "hasVideoSolution": false, "paidOnlyVideo": true, "__typename": "ArticleNode" }, "status": null, "sampleTestCase": "[1,2,3,4,5,3,1]\n3", "metaData": "{\n \"name\": \"findInMountainArray\",\n \"params\": [\n {\n \"name\": \"secret\",\n \"type\": \"integer[]\"\n },\n {\n \"name\": \"target\",\n \"type\": \"integer\"\n }\n ],\n \"return\": {\n \"type\": \"integer\"\n },\n \"manual\": true\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "enableTestMode": false, "enableDebugger": true, "envInfo": "{\"cpp\": [\"C++\", \"

Compiled with clang 11 using the latest C++ 20 standard.

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Most standard library headers are already included automatically for your convenience.

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