How to Solve Map Sum Pairs Problem
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Map Sum Pairs
Design a map that allows you to do the following: Maps a string key to a given value. Returns the sum of the values that have a key with a prefix equal to a given string. Implement the MapSum class: M...
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Understanding the Map Sum Pairs Problem
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Problem Statement
Design a map that allows you to do the following: Maps a string key to a given value. Returns the sum of the values that have a key with a prefix equal to a given string. Implement the MapSum class: MapSum() Initializes the MapSum object. void insert(String key, int val) Inserts the key-val pair into the map. If the key already existed, the original key-value pair will be overridden to the new one. int sum(string prefix) Returns the sum of all the pairs' value whose key starts with the prefix.
Map Sum Pairs
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Examples
Example inputExample outputConstraints
1 <= key.length, prefix.length <= 50key and prefix consist of only lowercase English letters.1 <= val <= 1000At most 50 calls will be made to insert and sum.How Interview Coder Helps with Leetcode Problems
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