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对线段树的理解不确切， 是不是有一个数组，代表每段长度为1的线段，然后在上面建立索引结构？还是只有一颗树，树的节点就是线段，那么树是一点点扩展，还是一开始就把节点接好还是只有一颗树，树的节点就是线段，那么树是一点点扩展，还是一开始就把节点接好 Followed by: Post your reply here: |
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