求和由于最后一扇门肯定在正方形的边界举，对每一个中点都求出要从给定点P到达此中点的所需要的最少的门的个数。-hello word wellcom to our school Delphi/java,CppBuilder visual c++Gone Fishing (1042) - ACM/ICPC Regional Contest East Central North America1999Descr iption Archeologists from the Ant