摘要：
小A的楼房外有一大片施工工地，工地上有N栋待建的楼房。每天，这片工地上的房子拆了又建、建了又拆。他经常无聊地看着窗外发呆，数自己能够看到多少栋房子。 为了简化问题，我们考虑这些事件发生在一个二维平面上。小A在平面上(0,0)点的位置，第i栋楼房可以用一条连接(i,0)和(i,Hi)的线段表示，其中H 阅读全文
摘要：
Painting some colored segments on a line, some previously painted segments may be covered by some the subsequent ones. Your task is counting the segme 阅读全文
摘要：
The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters at all pl 阅读全文