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OI-codes/Luogu/P2863/data/P2863_11.in
2022-01-07 21:51:52 +08:00

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10 20
9 7
3 3
10 7
1 10
6 3
3 3
7 10
3 6
3 9
2 2
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1 1
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3 1
1 2