bzoj 3144(ACM恢复训练) 3144: [Hnoi2013]切糕 Time Limit: 10 Sec Memory Limit: 128 MBSubmit: 2550 Solved: 1393[Submit][Status][Discuss] 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