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Contests/LeetCode/Weekly Contest 396/3136. Valid Word
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LeetCodeLeetCode
Easy
Weekly Contest 396

3136. Valid Word

StringGreedy
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Problem Statement

Official algorithmic problem description and constraints.

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A word is considered valid if:

  • It contains a minimum of 3 characters.
  • It consists of the digits 0-9, and the uppercase and lowercase English letters. (Not necessary to have all of them.)
  • It includes at least one vowel.
  • It includes at least one consonant.

You are given a string word.

Return true if word is valid, otherwise, return false.

Notes:

  • 'a', 'e', 'i', 'o', 'u', and their uppercases are vowels.
  • A consonant is an English letter that is not a vowel.

 

Example 1:

Input: word = "234Adas"

Output: true

Explanation:

This word satisfies the conditions.

Example 2:

Input: word = "b3"

Output: false

Explanation:

The length of this word is fewer than 3, and does not have a vowel.

Example 3:

Input: word = "a3$e"

Output: false

Explanation:

This word contains a '$' character and does not have a consonant.

 

Constraints:

  • 1 <= word.length <= 20
  • word consists of English uppercase and lowercase letters, digits, '@', '#', and '$'.


Solutions & Walkthrough

Detailed video explanations, mathematical intuition, and clean C++ implementation code.

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