Codeforces Round #179 (Div. 2) B. Yaroslav and Two Strings(组合数学)
摘要：
B. Yaroslav and Two Stringstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYaroslav thinks that two stringssandw, consisting of digits and having lengthnare non-comparable if there are two numbers,iandj(1 ≤ i, j ≤ n), such thatsi > wiandsj < 阅读全文
posted @ 2013-04-29 17:55 铁树银花 阅读(398) 评论(0) 推荐(0) 编辑
