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problemas-para-competicao-p…/rede-anel-estelar/input/51

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22 22
6 11
8 18
2 15
17 9
3 17
14 12
5 11
20 1
21 17
7 15
13 1
8 6
11 14
9 20
21 16
4 17
22 9
19 18
2 12
10 7
18 1
10 3