From 4b5cf230b0cc60e4101ece0bbc3039ced92ea626 Mon Sep 17 00:00:00 2001
From: chayan das <dasshuvo817@gmail.com>
Date: Tue, 15 Jul 2025 23:51:22 +0530
Subject: [PATCH] Create 3136. Valid Word

---
 3136. Valid Word | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 3136. Valid Word

diff --git a/3136. Valid Word b/3136. Valid Word
new file mode 100644
index 0000000..1876fcc
--- /dev/null
+++ b/3136. Valid Word	
@@ -0,0 +1,18 @@
+// bitset version
+class Solution {
+public:
+    bool isValid(string& word) {
+        const int n=word.size();
+        if (n<3) return 0;
+        bitset<2> v=0;
+        constexpr unsigned vowels=1|(1<<('e'-'a'))|(1<<('o'-'a'))|(1<<('i'-'a'))|(1<<('u'-'a'));
+        for(char c: word){
+            if (!isalpha(c) && !isdigit(c)) return 0;
+            if (isalpha(c)){
+                unsigned i=(c>'Z')?c-'a':c-'A';
+                v[(vowels>>i)&1]=1;
+            }
+        }
+        return v==3;
+    }
+};