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网上的解题报告本身就有问题,怎能如此二分?

Posted by a273108213 at 2011-04-13 11:58:40 on Problem 3621
我们假设点权为啊a[i],边权为e[i],
sgma(a[i])/sgam(e[i])<=ans;
sgma(a[i])<=ans*sgma(e[i]);
怎么能够代表就使新边权g[i]就直接让g[i]=e[i]*ans-a[i]?
明显只有在环下使才能使边和权一一对应,而显然,一般情况下点权和边权不是一一对应的。
要不测测这组
4 6
10 10 10 100
1 2 10
2 3 10
2 3 10
3 1 10
3 4 5
4 2 5
答案应该是2.6才对,但基本过的代码跑出来的都是6...

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