/**
 *
 * Ashish Patel
 * e: ashishsushilPatel@gmail.com
 * w: https://ashish.me
 *
 */

function TreeNode(val) {
  this.val = val
  this.left = this.right = null
}

const leafSimilarTree = (t1, t2) => {
  const traverse = (root, result) => {
    if (root && !root.left && !root.right) {
      result.push(root.val)
    }
    root.left && traverse(root.left, result)
    root.right && traverse(root.right, result)
    return result
  }
  let t1LeafNodes = traverse(t1, [])
  let t2LeafNodes = traverse(t2, [])
  return t1LeafNodes.join(' ') == t2LeafNodes.join(' ')
}

test('leafSimilarTree', () => {
  const t1 = new TreeNode(3)
  t1.right = new TreeNode(1)
  t1.left = new TreeNode(5)
  t1.left.left = new TreeNode(6)
  t1.left.right = new TreeNode(2)
  t1.left.right.left = new TreeNode(7)
  t1.left.right.right = new TreeNode(4)
  t1.right.left = new TreeNode(9)
  t1.right.right = new TreeNode(8)

  const t2 = new TreeNode(3)
  t2.right = new TreeNode(1)
  t2.left = new TreeNode(5)
  t2.left.left = new TreeNode(6)
  t2.left.right = new TreeNode(7)
  t2.right.left = new TreeNode(4)
  t2.right.right = new TreeNode(2)
  t2.right.right.left = new TreeNode(9)
  t2.right.right.right = new TreeNode(8)
  expect(leafSimilarTree(t1, t2)).toEqual(true)
})