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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
namespace BinaryTreePostorderTraversal
{
public class TreeNode
{
public int val;
public TreeNode left;
public TreeNode right;
public TreeNode(int val = 0, TreeNode left = null, TreeNode right = null)
{
this.val = val;
this.left = left;
this.right = right;
}
}
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
public IList<int> PostorderTraversal_DFS(TreeNode root)
{
var res = new List<int>();
DFS(root, res);
return res;
}
private void DFS(TreeNode node, List<int> res)
{
if(node == null) return;
DFS(node.left, res);
DFS(node.right, res);
res.Add(node.val);
}
}
}