Merge pull request #563 from notauserx/572-Subtree-of-Another-Tree-csharp

Create 572-Subtree-of-Another-Tree.cs

Author: Ahmad-A0

csharp/572-Subtree-of-Another-Tree.cs

@@ -0,0 +1,45 @@
+/**
+ * Definition for a binary tree node.
+ * 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;
+ *     }
+ * }
+ */
+public class Solution {
+    public bool IsSameTree(TreeNode one, TreeNode another)     {
+        if (one == null || another == null)
+            return one == another;
+        
+        return
+            one.val == another.val &&
+            IsSameTree(one.left, another.left) &&
+            IsSameTree(one.right, another.right);
+    }
+    public bool IsSubtree(TreeNode root, TreeNode subRoot) {
+        if (subRoot == null) return true;
+        if (root == null) return false;
+
+        var nodeToVisit = new Queue<TreeNode>();
+
+        nodeToVisit.Enqueue(root);
+
+        while (nodeToVisit.Count > 0) {
+            var cur = nodeToVisit.Dequeue();
+            var isSame = IsSameTree(cur, subRoot);
+            if (isSame) return true;
+
+            if (cur.left != null)
+                nodeToVisit.Enqueue(cur.left);
+            if (cur.right != null)
+                nodeToVisit.Enqueue(cur.right);
+        }
+
+        return false;
+    }
+}