Leetcode Problem 2047. Number of Valid Words in a Sentence

2047. Number of Valid Words in a Sentence

Leetcode Solutions

Split the sentence into tokens using space as the delimiter.
Initialize a counter to keep track of valid words.
Iterate over each token in the list of tokens.
For each token, check if it contains any digits; if so, skip to the next token.
Check if the token has more than one hyphen or punctuation mark; if so, skip to the next token.
If there is a hyphen, check that it is surrounded by lowercase letters; if not, skip to the next token.
If there is a punctuation mark, check that it is at the end of the token; if not, skip to the next token.
If the token passes all checks, increment the valid word counter.
After iterating through all tokens, return the valid word counter as the result.

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