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Program.cs
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Program.cs
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using System;
namespace DiameterOfBinaryTree
{
public class TreeNode
{
public int val;
public TreeNode left;
public TreeNode right;
public TreeNode(int x) { val = x; }
}
class Program
{
static void Main(string[] args)
{
TreeNode a = new TreeNode(1);
TreeNode b = new TreeNode(2);
TreeNode c = new TreeNode(3);
TreeNode d = new TreeNode(4);
TreeNode e = new TreeNode(5);
a.left = b;
a.right = c;
b.left = d;
b.right = e;
Console.WriteLine(DiameterOfBinaryTree(a));
}
static int max = 0;
static int DiameterOfBinaryTree(TreeNode root)
{
MaxDepth(root);
return max;
}
static int MaxDepth(TreeNode node)
{
if (node == null)
return 0;
int left = MaxDepth(node.left);
int right = MaxDepth(node.right);
max = Math.Max(max, left + right);
return 1 + Math.Max(left, right);
}
}
}