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leetcode-algorithms/src/ValidWord.java at master · anishLearnsToCode/leetcode-algorithms · GitHub

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// https://leetcode.com/problems/valid-word

// T: O(N)

// S: O(1)

import java.util.Set;

public class ValidWord {

private static final Set<Character> VOWELS = Set.of('a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U');

public boolean isValid(String word) {

return word.length() >= 3 && isAlphaNum(word) && hasOneVowel(word) && hasOneConsonant(word);

}

private static boolean isAlphaNum(String s) {

for (int i = 0 ; i < s.length() ; i++) {

if (!Character.isAlphabetic(s.charAt(i)) && !Character.isDigit(s.charAt(i))) {

return false;

}

}

return true;

}

private static boolean hasOneVowel(String s) {

for (int i = 0 ; i < s.length() ; i++) {

if (VOWELS.contains(s.charAt(i))) {

return true;

}

}

return false;

}

private static boolean hasOneConsonant(String s) {

for (int i = 0 ; i < s.length() ; i++) {

if (Character.isAlphabetic(s.charAt(i)) && !VOWELS.contains(s.charAt(i))) {

return true;

}

}

return false;

}

}

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