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problemas-para-competicao-p…/quase-menor-caminho/input/2

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76 B
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2 1
0 1
0 1 7
3 3
0 2
0 1 1
1 2 1
0 2 3
4 4
0 3
0 1 1
1 3 1
0 2 1
2 3 1
0 0