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需要注意被包围的情况

Posted by lddlinan at 2021-04-12 21:45:15 on Problem 3410
11
0 0
6 0
6 4
3 4
3 3
5 2
3 1
1 2
3 3
3 4
0 4
4
1 2
3 1
5 2
3 3

ans: 1

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