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Program.cs
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Program.cs
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using System;
using System.Linq;
namespace PseudoPalindromicPathsInABinaryTree
{
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!");
}
private static int count;
static int PseudoPalindromicPaths(TreeNode root)
{
CountValidPath(root, new int[10]);
return count;
}
static void CountValidPath(TreeNode node, int[] record)
{
if (node == null) return;
record[node.val]++;
if (node.left == node.right && record.Count(x => x % 2 != 0) < 2)
count++;
CountValidPath(node.left, record);
CountValidPath(node.right, record);
record[node.val]--;
}
}
}