2019年3月27日
RGB Coloring(组合数模板）
摘要： 7720: RGB Coloring 题目描述 Takahashi has a tower which is divided into N layers. Initially, all the layers are uncolored. Takahashi is going to paint som 阅读全文
posted @ 2019-03-27 16:52 oc_co 阅读(291) 评论(0) 推荐(1)