1. 二叉树 平衡二叉树 和 二叉查找树
https://mp.weixin.qq.com/s?src=11×tamp=1571799495&ver=1929&signature=gBHP4AUtor6JQOMrcxBSUYzQNvkRsOgDxuQSVif5Tk9iPYmBUQeFD96iv1xvlcTVRdlekgSL*TeJfiRqMz6dB8lm1xpIuDsnsxFPBRkCGvx*8Y5OdIAdaMl-daltKlRx&new=1
2 红黑树
https://mp.weixin.qq.com/s?src=11×tamp=1571800008&ver=1929&signature=DI0tCEjGEWu5d87y-UNkJVX-Y1Zu5wan93yARIF-XCXZtloPxdq6qOH6VucS1RPzwXpc19hAO4WhXXWnnOlk*J2KSfKhKUercEhcOo1APwzuW6qVtOscDFJJGHdGtY3v&new=1