3174

Author: Amir-16

Easy/3174. Clear Digits/solution.php

@@ -0,0 +1,27 @@
+<?php
+class Solution
+{
+    /**
+     * @param String $s
+     * @return String
+     */
+    public function clearDigits($s)
+    {
+        $stack = [];
+
+        for ($i = 0; $i < strlen($s); $i++) {
+            if (ctype_digit($s[$i])) {
+                if (! empty($stack)) {
+                    array_pop($stack);
+                }
+            } else {
+                $stack[] = $s[$i];
+            }
+        }
+        return implode("", $stack);
+    }
+}
+
+$solution = new Solution();
+
+echo $solution->clearDigits('cb34');