heozeop: valid palindrome

valid-palindrome/heozeop.cpp

@@ -0,0 +1,23 @@
+// Time Complexity: O(n)
+// Spatial Complexity: O(n)
+
+class Solution {
+public:
+    bool isPalindrome(string s) {
+        string temp = "";
+        for(char c : s) {
+            if(isalnum(c)) {
+                temp += tolower(c);
+            }
+        }
+
+        int length = temp.length();
+        for(int i = 0; i < length / 2; ++i) {
+            if(temp[i] != temp[length - 1 - i]) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+};