Problem3655--【Div2】DFS练习-Kefa and Park

3655: 【Div2】DFS练习-Kefa and Park

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 1Submit Num: 2Statistics

Description

Sample Input Copy 

4 1
1 1 0 0
1 2
1 3
1 4

Sample Output Copy 

2

Source/Category

dfs 图论 树 
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