1790

Author: Amir-16

Easy/1790. Check if One String Swap Can Make Strings Equal/solution.php

@@ -1,13 +1,39 @@
 <?php
+class Solution
+{
+    /**
+     * @param String $s1
+     * @param String $s2
+     * @return Boolean
+     */
+    public function areAlmostEqual($s1, $s2)
+    {
+        if ($s1 === $s2) {
+            return true;
+        }
 
-class Solution {
+        $diff = [];
 
-  
-    function areAlmostEqual($s1, $s2) {
-        
+        // Find positions where characters differ
+        for ($i = 0; $i < strlen($s1); $i++) {
+            if ($s1[$i] !== $s2[$i]) {
+                $diff[] = $i;
+            }
+        }
+
+        // If there are exactly two differences, check if swapping them fixes the strings
+        return count($diff) === 2 &&
+            $s1[$diff[0]] === $s2[$diff[1]] &&
+            $s1[$diff[1]] === $s2[$diff[0]];
     }
 }
 
+$solution = new Solution();
+
+$s1 = "abcd";
+
+$s2 = "dcba";
 
+$result = $solution->areAlmostEqual($s1, $s2); // Output: true
 
-?>
+print_r($result);