Create 0337-house-robber-iii.js

Author: aadil42

javascript/0337-house-robber-iii.js

@@ -0,0 +1,30 @@
+/**
+ * Post Order Traversal
+ * Time O(n) | Space (n)
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @return {number}
+ */
+var rob = function(root) {
+    
+    function dfs(root) {
+        if(!root) return [0, 0];
+
+        const leftSubTree = dfs(root.left);
+        const rightSubTree = dfs(root.right);
+
+        const withoutRoot = Math.max(...leftSubTree) + Math.max(...rightSubTree);
+        const withRoot = root.val + leftSubTree[0] + rightSubTree[0];
+
+        return [withoutRoot,  withRoot];
+    }
+
+   return Math.max(...dfs(root));
+};