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WA的同学注意一下这里, 可能不是精度问题.注意一下在二分的时候遇到可行解就记录一下最优值, 二分结束后再用这个最优值做一次最大流即可, 因为二分的时候可能会丢失最优值. 我的 eps=1e-18, 二分精度 lim=1e-5 Followed by:
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