{ "data": { "question": { "questionId": "1000330", "questionFrontendId": "LCR 066", "categoryTitle": "Algorithms", "boundTopicId": 910324, "title": " 键值映射", "titleSlug": "z1R5dt", "content": "

English description is not available for the problem. Please switch to Chinese.

\n", "translatedTitle": " 键值映射", "translatedContent": "

实现一个 MapSum 类，支持两个方法，insert 和 sum：

\n\n\n\n

 

\n\n

示例：

\n\n
\n输入：\ninputs = ["MapSum", "insert", "sum", "insert", "sum"]\ninputs = [[], ["apple", 3], ["ap"], ["app", 2], ["ap"]]\n输出：\n[null, null, 3, null, 5]\n\n解释：\nMapSum mapSum = new MapSum();\nmapSum.insert("apple", 3);  \nmapSum.sum("ap");           // return 3 (apple = 3)\nmapSum.insert("app", 2);    \nmapSum.sum("ap");           // return 5 (apple + app = 3 + 2 = 5)\n
\n\n

 

\n\n

提示：

\n\n\n\n

 

\n\n

注意：本题与主站 677 题相同： https://leetcode-cn.com/problems/map-sum-pairs/

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"translatedName": "设计", "__typename": "TopicTagNode" }, { "name": "Trie", "slug": "trie", "translatedName": "字典树", "__typename": "TopicTagNode" }, { "name": "Hash Table", "slug": "hash-table", "translatedName": "哈希表", "__typename": "TopicTagNode" }, { "name": "String", "slug": "string", "translatedName": "字符串", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "C++", "langSlug": "cpp", "code": "class MapSum {\npublic:\n /** Initialize your data structure here. */\n MapSum() {\n\n }\n \n void insert(string key, int val) {\n\n }\n \n int sum(string prefix) {\n\n }\n};\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * MapSum* obj = new MapSum();\n * obj->insert(key,val);\n * int param_2 = obj->sum(prefix);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Java", "langSlug": "java", "code": "class MapSum {\n\n /** Initialize your data structure here. */\n public MapSum() {\n\n }\n \n public void insert(String key, int val) {\n\n }\n \n public int sum(String prefix) {\n\n }\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * MapSum obj = new MapSum();\n * obj.insert(key,val);\n * int param_2 = obj.sum(prefix);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "class MapSum(object):\n\n def __init__(self):\n \"\"\"\n Initialize your data structure here.\n \"\"\"\n\n\n def insert(self, key, val):\n \"\"\"\n :type key: str\n :type val: int\n :rtype: None\n \"\"\"\n\n\n def sum(self, prefix):\n \"\"\"\n :type prefix: str\n :rtype: int\n \"\"\"\n\n\n\n# Your MapSum object will be instantiated and called as such:\n# obj = MapSum()\n# obj.insert(key,val)\n# param_2 = obj.sum(prefix)", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "class MapSum:\n\n def __init__(self):\n \"\"\"\n Initialize your data structure here.\n \"\"\"\n\n\n def insert(self, key: str, val: int) -> None:\n\n\n def sum(self, prefix: str) -> int:\n\n\n\n# Your MapSum object will be instantiated and called as such:\n# obj = MapSum()\n# obj.insert(key,val)\n# param_2 = obj.sum(prefix)", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "\n\n\ntypedef struct {\n \n} MapSum;\n\n/** Initialize your data structure here. */\n\nMapSum* mapSumCreate() {\n \n}\n\nvoid mapSumInsert(MapSum* obj, char * key, int val) {\n \n}\n\nint mapSumSum(MapSum* obj, char * prefix) {\n \n}\n\nvoid mapSumFree(MapSum* obj) {\n \n}\n\n/**\n * Your MapSum struct will be instantiated and called as such:\n * MapSum* obj = mapSumCreate();\n * mapSumInsert(obj, key, val);\n \n * int param_2 = mapSumSum(obj, prefix);\n \n * mapSumFree(obj);\n*/", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class MapSum {\n\n /** Initialize your data structure here. */\n public MapSum() {\n\n }\n \n public void Insert(string key, int val) {\n\n }\n \n public int Sum(string prefix) {\n\n }\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * MapSum obj = new MapSum();\n * obj.Insert(key,val);\n * int param_2 = obj.Sum(prefix);\n */", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * Initialize your data structure here.\n */\nvar MapSum = function() {\n\n};\n\n/** \n * @param {string} key \n * @param {number} val\n * @return {void}\n */\nMapSum.prototype.insert = function(key, val) {\n\n};\n\n/** \n * @param {string} prefix\n * @return {number}\n */\nMapSum.prototype.sum = function(prefix) {\n\n};\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * var obj = new MapSum()\n * obj.insert(key,val)\n * var param_2 = obj.sum(prefix)\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "class MapSum {\n constructor() {\n\n }\n\n insert(key: string, val: number): void {\n\n }\n\n sum(prefix: string): number {\n\n }\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * var obj = new MapSum()\n * obj.insert(key,val)\n * var param_2 = obj.sum(prefix)\n */", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class MapSum {\n /**\n * Initialize your data structure here.\n */\n function __construct() {\n\n }\n\n /**\n * @param String $key\n * @param Integer $val\n * @return NULL\n */\n function insert($key, $val) {\n\n }\n\n /**\n * @param String $prefix\n * @return Integer\n */\n function sum($prefix) {\n\n }\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * $obj = MapSum();\n * $obj->insert($key, $val);\n * $ret_2 = $obj->sum($prefix);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "\nclass MapSum {\n\n /** Initialize your data structure here. */\n init() {\n\n }\n \n func insert(_ key: String, _ val: Int) {\n\n }\n \n func sum(_ prefix: String) -> Int {\n\n }\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * let obj = MapSum()\n * obj.insert(key, val)\n * let ret_2: Int = obj.sum(prefix)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class MapSum() {\n\n /** Initialize your data structure here. */\n\n\n fun insert(key: String, `val`: Int) {\n\n }\n\n fun sum(prefix: String): Int {\n\n }\n\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * var obj = MapSum()\n * obj.insert(key,`val`)\n * var param_2 = obj.sum(prefix)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "type MapSum struct {\n\n}\n\n\n/** Initialize your data structure here. */\nfunc Constructor() MapSum {\n\n}\n\n\nfunc (this *MapSum) Insert(key string, val int) {\n\n}\n\n\nfunc (this *MapSum) Sum(prefix string) int {\n\n}\n\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * obj := Constructor();\n * obj.Insert(key,val);\n * param_2 := obj.Sum(prefix);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "class MapSum\n\n=begin\n Initialize your data structure here.\n=end\n def initialize()\n\n end\n\n\n=begin\n :type key: String\n :type val: Integer\n :rtype: Void\n=end\n def insert(key, val)\n\n end\n\n\n=begin\n :type prefix: String\n :rtype: Integer\n=end\n def sum(prefix)\n\n end\n\n\nend\n\n# Your MapSum object will be instantiated and called as such:\n# obj = MapSum.new()\n# obj.insert(key, val)\n# param_2 = obj.sum(prefix)", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "class MapSum() {\n\n /** Initialize your data structure here. */\n\n\n def insert(key: String, `val`: Int) {\n\n }\n\n def sum(prefix: String): Int = {\n\n }\n\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * var obj = new MapSum()\n * obj.insert(key,`val`)\n * var param_2 = obj.sum(prefix)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "struct MapSum {\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 MapSum {\n\n /** Initialize your data structure here. */\n fn new() -> Self {\n\n }\n \n fn insert(&self, key: String, val: i32) {\n\n }\n \n fn sum(&self, prefix: String) -> i32 {\n\n }\n}\n\n/**\n * Your MapSum object will be instantiated and called as such:\n * let obj = MapSum::new();\n * obj.insert(key, val);\n * let ret_2: i32 = obj.sum(prefix);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "(define map-sum%\n (class object%\n (super-new)\n (init-field)\n \n ; insert : string? exact-integer? -> void?\n (define/public (insert key val)\n\n )\n ; sum : string? -> exact-integer?\n (define/public (sum prefix)\n\n )))\n\n;; Your map-sum% object will be instantiated and called as such:\n;; (define obj (new map-sum%))\n;; (send obj insert key val)\n;; (define param_2 (send obj sum prefix))", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec map_sum_init_() -> any().\nmap_sum_init_() ->\n .\n\n-spec map_sum_insert(Key :: unicode:unicode_binary(), Val :: integer()) -> any().\nmap_sum_insert(Key, Val) ->\n .\n\n-spec map_sum_sum(Prefix :: unicode:unicode_binary()) -> integer().\nmap_sum_sum(Prefix) ->\n .\n\n\n%% Your functions will be called as such:\n%% map_sum_init_(),\n%% map_sum_insert(Key, Val),\n%% Param_2 = map_sum_sum(Prefix),\n\n%% map_sum_init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule MapSum do\n @spec init_() :: any\n def init_() do\n\n end\n\n @spec insert(key :: String.t, val :: integer) :: any\n def insert(key, val) do\n\n end\n\n @spec sum(prefix :: String.t) :: integer\n def sum(prefix) do\n\n end\nend\n\n# Your functions will be called as such:\n# MapSum.init_()\n# MapSum.insert(key, val)\n# param_2 = MapSum.sum(prefix)\n\n# MapSum.init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"17.3K\", \"totalSubmission\": \"27K\", \"totalAcceptedRaw\": 17348, \"totalSubmissionRaw\": 26951, \"acRate\": \"64.4%\"}", "hints": [], "solution": null, "status": null, "sampleTestCase": "[\"MapSum\", \"insert\", \"sum\", \"insert\", \"sum\"]\n[[], [\"apple\",3], [\"ap\"], [\"app\",2], [\"ap\"]]", "metaData": "{\"classname\": \"MapSum\", \"maxbytesperline\": 200000, \"systemdesign\": true, \"constructor\": {\"params\": []}, \"methods\": [{\"name\": \"insert\", \"params\": [{\"name\": \"key\", \"type\": \"string\"}, {\"name\": \"val\", \"type\": \"integer\"}], \"return\": {\"type\": \"void\"}}, {\"name\": \"sum\", \"params\": [{\"name\": \"prefix\", \"type\": \"string\"}], \"return\": {\"type\": 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