ViS is Visual Splay tree
You can see
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how splay rotate
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what will happen if you insert a node, splay a node or delete a node
some examples:
wait update
你可以用ViS来动态观察
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伸展树旋转的样子
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删除结点的时候会发生什么
双击节点来将这个节点伸展到根
右击唤出菜单
拖动鼠标左键来拖动画布
build = 从1到15插入节点