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OI-codes/BZOJ/1977/data/6.in

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7 15
6 3 35
1 6 44
3 2 22
2 7 57
5 1 57
5 6 65
5 3 44
7 4 57
7 2 44
7 1 44
4 5 44
4 5 44
2 3 65
1 7 44
1 2 44