3144: [Hnoi2013]切糕
Time Limit: 10 Sec Memory Limit: 128 MBSubmit: 2550 Solved: 1393
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Description
题解:
巧妙建图,(x,z) --> (x,z - d) 形成回路,使得必须割[z-d,z+d]之间的边
详见:https://blog.csdn.net/thy_asdf/article/details/50428973