Improved task 3136

Author: javadev

src/main/java/g3101_3200/s3136_valid_word/Solution.java

@@ -1,24 +1,33 @@
 package g3101_3200.s3136_valid_word;
 
-// #Easy #String #2025_07_15_Time_1_ms_(99.12%)_Space_42.10_MB_(62.25%)
+// #Easy #String #2024_05_07_Time_1_ms_(99.39%)_Space_41.9_MB_(59.69%)
 
 public class Solution {
     public boolean isValid(String word) {
         if (word.length() < 3) {
             return false;
         }
+        if (word.contains("@") || word.contains("#") || word.contains("$")) {
+            return false;
+        }
+        char[] vowels = {'a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'};
+        char[] consonants = {
+            'b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v',
+            'w', 'x', 'y', 'z', 'B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'Q',
+            'R', 'S', 'T', 'V', 'W', 'X', 'Y', 'Z'
+        };
         boolean hasVowel = false;
         boolean hasConsonant = false;
-        for (char c : word.toCharArray()) {
-            if (Character.isLetter(c)) {
-                char ch = Character.toLowerCase(c);
-                if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
-                    hasVowel = true;
-                } else {
-                    hasConsonant = true;
-                }
-            } else if (!Character.isDigit(c)) {
-                return false;
+        for (char c : vowels) {
+            if (word.indexOf(c) != -1) {
+                hasVowel = true;
+                break;
+            }
+        }
+        for (char c : consonants) {
+            if (word.indexOf(c) != -1) {
+                hasConsonant = true;
+                break;
             }
         }
         return hasVowel && hasConsonant;