2018年8月19日
poj2279——Mr. Young's Picture Permutations
摘要： Description Mr. Young wishes to take a picture of his class. The students will stand in rows with each row no longer than the row behind it and the le 阅读全文
posted @ 2018-08-19 20:59 Acerkoo 阅读(144) 评论(0) 推荐(0) 编辑