2015年5月28日

【杨氏矩阵+勾长公式】POJ 2279 Mr. Young's Picture Permutations

摘要： DescriptionMr. 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 lef... 阅读全文

posted @ 2015-05-28 16:53 LLGemini 阅读(572) 评论(0) 推荐(0) 编辑