Problem3587--【Div2】GESP六级2026三月P1-完全二叉树

3587: 【Div2】GESP六级2026三月P1-完全二叉树

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Time Limit : 1.000 sec  Memory Limit : 128 MB

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Description




Sample Input Copy 

4
2 3
4 0
0 0
0 0

Sample Output Copy 

4

Source/Category

GESP 图论 树 DFS 
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