在菜单栏找到：Tools-->Execute Commands --> Edit/Run Script 快捷键：Ctrl+Shift+X 输入下边的代码就可以了。（UCase大写 LCase小写）
![[leetcode] 701. Insert into a Binary Search Tree[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)