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OI-codes/S2OJ/790/data/wayhome4.in
2022-05-29 07:47:12 +08:00

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18 11
11 9
3 1
7 1
4 10
7 9
5 3
1 1
1 7
4 6
10 3
3 1
6 10
6 3
10 6
4 1
1 6
5 7
8 3