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var assert = require('assert');
function isGraphTree(n, edges) {
// fill in
return true;
}
function Node(val) {
this.val = val;
this.left = null;
this.right = null;
}
// Regular binary trees
var tree1 = new Node(4);
tree1.left = new Node(1);
tree1.right = new Node(3);
var tree2 = new Node(5);
tree2.left = new Node(10);
tree2.left.left = new Node(17);
tree2.left.right = new Node(3);
tree2.right = new Node(8);
// Binary search trees
var tree3 = new Node(6);
tree3.left = new Node(3);
OUTPUT
Results will appear here.