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添加0222.完全二叉树的节点个数Go版本.md

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`@@ -437,6 +437,33 @@ func countNodes(root *TreeNode) int {`
`437`	`437`	`}`
`438`	`438`	```
`439`	`439`
	`440`	`+迭代法`
	`441`	`+`
	`442`	+```go
	`443`	`+func countNodes(root *TreeNode) int {`
	`444`	`+ if root == nil {`
	`445`	`+ return 0`
	`446`	`+ }`
	`447`	`+ q := list.New()`
	`448`	`+ q.PushBack(root)`
	`449`	`+ res := 0`
	`450`	`+ for q.Len() > 0 {`
	`451`	`+ n := q.Len()`
	`452`	`+ for i := 0; i < n; i++ {`
	`453`	`+ node := q.Remove(q.Front()).(*TreeNode)`
	`454`	`+ if node.Left != nil {`
	`455`	`+ q.PushBack(node.Left)`
	`456`	`+ }`
	`457`	`+ if node.Right != nil {`
	`458`	`+ q.PushBack(node.Right)`
	`459`	`+ }`
	`460`	`+ res++`
	`461`	`+ }`
	`462`	`+ }`
	`463`	`+ return res`
	`464`	`+}`
	`465`	+```
	`466`	`+`
`440`	`467`
`441`	`468`
`442`	`469`	`## JavaScript:`

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