Leetcode problem 58 - Number of Arithmetic Triplets
You are given a 0-indexed, strictly increasing integer array nums and a positive integer diff. A triplet (i, j, k) is an arithmetic triplet if the following ...
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Leetcode problem 57 - Decode the Message
You are given the strings key and message, which represent a cipher key and a secret message, respectively. The steps to decode message are as follows:
Leetcode problem 56 - Design an Ordered Stream
There is a stream of n (idKey, value) pairs arriving in an arbitrary order, where idKey is an integer between 1 and n and value is a string. No two pairs hav...
Leetcode problem 55 - Truncate Sentence
A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each of the words consists of only uppercase and lower...
Leetcode problem 54 - Check If Two String Arrays are Equivalent
Given two string arrays word1 and word2, return true if the two arrays represent the same string, and false otherwise.