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OI-codes/BZOJ/3669/data/17.in

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5 10
2 1 9 5
5 4 9 1
5 5 8 1
4 5 10 9
5 4 7 2
4 5 7 2
2 1 1 9
2 2 10 1
5 4 7 5
3 1 7 6