Jwing28 · October 17, 2017 02:00
diff --git a/bst.js b/bst.js
 //all nodes to the right and above current can be added to the value of the current node
 //***How can I think about this? I try thinking about it visually and it's very slow to draw out the call stack 
 //is there a more effective way ? Often I get lost in the call stack. 

 var sum = 0;
 var convertBST = function(root) {

 if(root === null) return null;
 convertBST(root.right);
 root.val += sum; 
 sum = root.val;
 convertBST(root.left);
    console.log('x',root);
 return root;
 };
	//all nodes to the right and above current can be added to the value of the current node
	//***How can I think about this? I try thinking about it visually and it's very slow to draw out the call stack
	//is there a more effective way ? Often I get lost in the call stack.

	var sum = 0;
	var convertBST = function(root) {

	if(root === null) return null;
	convertBST(root.right);
	root.val += sum;
	sum = root.val;
	convertBST(root.left);
	console.log('x',root);
	return root;
	};