增加No965

Author: tujietg

leetcode/Tree/No965.java

@@ -0,0 +1,22 @@
+package Algorithm.leetcode.Tree;
+
+/**
+ * No965
+ * 
+ * Created by tujietg on Jan 21, 2020
+ */
+public class No965 {
+	public boolean isUnivalTree(TreeNode root) {
+		if (root == null) {
+			return true;
+		}
+		if (root.left != null && root.left.val != root.val) {
+			return false;
+		}
+		if (root.right != null && root.right.val != root.val) {
+			return false;
+		}
+
+		return isUnivalTree(root.left) && isUnivalTree(root.right);
+	}
+}