“`” 参考回答：
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https://uploadfiles.nowcoder.com/images/20190315/311436_1552653496599_71EA3264851B533E3619F2B4FA0734BA""> T为叶子节点的个数,w为叶子节点的分数
<pre><code> "“`
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