Day i do not know

101. Symmetric Tree/Program.cs

@@ -0,0 +1,13 @@
+namespace _101._Symmetric_Tree;
+
+internal class Program
+{
+    static void Main(string[] args)
+    {
+        var t = new TreeNode(3, 
+            new TreeNode(4, new TreeNode(5, new TreeNode(6), null), null), 
+            new TreeNode(4, null, new TreeNode(5, null, new TreeNode(6)))
+            );
+        Console.WriteLine(new Solution().IsSymmetric(t));
+    }
+}