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感觉这题有问题，欢迎大家来拍砖这题做的很郁闷啊，首先是卡sap,只能用dinic...其次是我觉得这题把正反边都建起来貌似有问题吧，无向图的边如果当成两条有向边我觉得好像是不对的，我觉得正确的做法是先做次单源最短路然后按照dis数组升序给边安排方向，最后做一次最大流看流量是否大于t...当然数据无情地鄙视了我的想法。。。 Followed by:
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