Sep 30, 2022 · Sep 26, 2022 · Sep 26, 2022 · Sep 26, 2022 · Sep 26, 2022 · Sep 27, 2022
diff --git a/problems/0222.完全二叉树的节点个数.md b/problems/0222.完全二叉树的节点个数.md
Original file line number	Diff line number	Diff line change
Expand Up		@@ -437,6 +437,33 @@ func countNodes(root *TreeNode) int {
		}
		```

	迭代法

	```go
	func countNodes(root *TreeNode) int {
	if root == nil {
	return 0
	}
	q := list.New()
	q.PushBack(root)
	res := 0
	for q.Len() > 0 {
	n := q.Len()
	for i := 0; i < n; i++ {
	node := q.Remove(q.Front()).(*TreeNode)
	if node.Left != nil {
	q.PushBack(node.Left)
	}
	if node.Right != nil {
	q.PushBack(node.Right)
	}
	res++
	}
	}
	return res
	}
	```



		## JavaScript:
Expand Down