u

2026-06-22 20:50:10 +10:00
parent b63ad2d95d
commit 5c25a2e856
7 changed files with 218 additions and 0 deletions
@@ -0,0 +1,25 @@
+package top100liked
+
+// https://leetcode.cn/problems/flatten-binary-tree-to-linked-list/description/?envType=study-plan-v2&envId=top-100-liked
+
+type TreeNode struct {
+	Val   int
+	Left  *TreeNode
+	Right *TreeNode
+}
+
+func flatten(root *TreeNode) {
+	var prev *TreeNode
+	var helper func(*TreeNode)
+	helper = func(node *TreeNode) {
+		if node == nil {
+			return
+		}
+		helper(node.Right)
+		helper(node.Left)
+		node.Right = prev
+		node.Left = nil
+		prev = node
+	}
+	helper(root)
+}