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注意精度问题eps=1e-6； lx[x]+ly[i]-cost[x,i]<eps 还有没有其他高招？ 样例是不是有问题？ 我得出 4 2 3 5 1 却过了测试数据 这道题是完全二分图，用slack优化效果明显 Followed by:
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