摘要:
Although winter is far away, squirrels have to work day and night to save beans. They need plenty of food to get through those long cold days. After s 阅读全文
摘要:
有一个无限大的矩形,初始时你在左上角(即第一行第一列),每次你都可以选择一个右下方格子,并瞬移过去(如从下图中的红色格子能直接瞬移到蓝色格子),求到第nn 行第mm 列的格子有几种方案,答案对10000000071000000007 取模。 Input多组测试数据。 两个整数n,m(2≤n,m≤10 阅读全文