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请问题目怎么理解啊，为什么是tree dp呢？不解。。。

Posted by doommetal at 2007-10-01 11:14:06 on Problem 2486 
题目不是说，从node1开始走，到一个node就吃掉那里的苹果，直到走到k步或者无路可走吗？

那么bfs不就对了了吗？为什么还要tree dp呢？

牛人帮我。。。
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