An abbreviation of a word follows the form <first letter><number><last letter>. ...
International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: a maps to . , b maps to ... , c maps to . . , and so on. For convenience, ...
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An abbreviation of a word follows the form <first letter><number><last letter>. ...
Given a list of words (without duplicates), please write a program that returns all concatenated words in the given list of words. A concatenated ...
In English, we have a concept called root, which can be followed by some other words to form another longer word - let's call this word ...
Every email consists of a local name and a domain name, separated by the @ sign. For example, in alice@leetcode.com, alice is the local name ...
Given a set of keywords words and a string S, make all appearances of all keywords in S bold. Any letters between <b> and </b> tags ...
Given an input string, reverse the string word by word. For example, Given s = "the sky is blue ...
Given a list of words, we may encode it by writing a reference string S and a list of indexes A. For example, if the list of words is ["time ...
Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231 - 1. For example, Hint ...