摘要：自定义优先队列是从大到小的； 从小到大排序则是； 结构体排序 阅读全文

摘要：There are N towns on a plane. The i-th town is located at the coordinates (xi,yi). There may be more than one town at the same coordinates.You can bui 阅读全文

摘要：其他模板代码的b&1就是b%2==1的意思，这个是最容易理解的模板 阅读全文