226

2 files changed, 45 insertions, 0 deletions

diff --git a/226/go.mod b/226/go.mod
new file mode 100644
index 0000000..9a2c826
--- /dev/null
+++ b/226/go.mod
@@ -0,0 +1,3 @@
+module 226
+
+go 1.19
diff --git a/226/main.go b/226/main.go
new file mode 100644
index 0000000..da66748
--- /dev/null
+++ b/226/main.go
@@ -0,0 +1,42 @@
+package main
+
+import "fmt"
+
+type TreeNode struct {
+	Val   int
+	Left  *TreeNode
+	Right *TreeNode
+}
+
+func invertTree(root *TreeNode) *TreeNode {
+	var invert func(root *TreeNode)
+	invert = func(root *TreeNode) {
+		if root == nil {
+			return
+		}
+
+		root.Left, root.Right = root.Right, root.Left
+		invert(root.Left)
+		invert(root.Right)
+	}
+	invert(root)
+
+	return root
+}
+
+// func invertTree(root *TreeNode) *TreeNode {
+// 	if root == nil {
+// 		return nil
+// 	}
+
+// 	right := invertTree(root.Right)
+// 	left := invertTree(root.Left)
+// 	root.Left = right
+// 	root.Right = left
+
+// 	return root
+// }
+
+func main() {
+	fmt.Println("vim-go")
+}