2017年4月8日
ZOJ - 3780-Paint the Grid Again-（拓扑排序）
摘要： Description Leo has a grid with N × N cells. He wants to paint each cell with a specific color (either black or white). Leo has a magical brush which can paint any row with black color, or any colum... 阅读全文
posted @ 2017-04-08 21:01 Pic 阅读(139) 评论(0) 推荐(0) 编辑