#BZOJ1486. 最小圈
最小圈
题目描述

4 5
1 2 5
2 3 5
3 1 5
2 4 3
4 1 3
3.66666667

4 5
1 2 5
2 3 5
3 1 5
2 4 3
4 1 3
3.66666667
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