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23 lines
428 B
Go
23 lines
428 B
Go
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// File: preorder_traversal_i_compact.go
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// Created Time: 2023-05-09
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// Author: Reanon (793584285@qq.com)
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package chapter_backtracking
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import (
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. "github.com/krahets/hello-algo/pkg"
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)
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/* 前序遍历：例题一 */
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func preOrderI(root *TreeNode, res *[]*TreeNode) {
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if root == nil {
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return
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}
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if int(root.Val) == 7 {
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// 记录解
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*res = append(*res, root)
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}
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preOrderI(root.Left, res)
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preOrderI(root.Right, res)
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}
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