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绝世好数据

Posted by a1b3c7d9 at 2019-11-01 20:19:03 on Problem 2942
7 12
1 7
2 1
3 6
7 6
1 4
4 7
4 2
1 5
2 3
2 7
6 5
5 3

ans:7

卡掉没用二分图的选手,自以为自己对点双性质理解很透彻

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