Add solution 169.

Author: javadev

src/Algorithms/0169.majority-element/majority-element.php

@@ -0,0 +1,11 @@
+class Solution {
+
+    /**
+     * @param Integer[] $nums
+     * @return Integer
+     */
+    function majorityElement($nums) {
+        sort($nums);
+        return $nums[intval(count($nums)/2)];
+    }
+}