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Solution: Find Words That Can Be Formed by Characters

Explore how to determine which words can be formed using characters from a given string by implementing frequency maps. Learn to compare character counts to validate words and compute the total length of valid words. Understand the solution’s time and space complexities to optimize coding interviews.

Statement

You are given an array of strings words and a string chars.

A string in words is considered good if it can be formed using only the characters available in chars, where each character in chars may be used at most once per word.

Return the sum of the lengths of all good strings in words.

Constraints:

  • 11 \leq words.length 1000\leq 1000

  • 11 \leq words[i].length, chars.length ...