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NADOS

Tree And Extra Edge

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https://www.codechef.com/problems/TREEDGE
Input Format 
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Output Format 
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Question Video
Constraints 
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Sample Input 
1
7 3
1 2 1
1 3 -2
2 4 3
2 5 -4
5 7 5
3 6 6
2 3 1
5 4 2
5 6 0
Sample Output 
10
7
5


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