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题目: Description Bessie has moved to a small farm and sometimes enjoys returning to visit one of her best friends. She does not want to get to her old 阅读全文
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最后一次NOIP模拟了····· 题目1:回文数字 Tom 最近在研究回文数字。 假设 s[i] 是长度为 i 的回文数个数(不含前导0),则对于给定的正整数 n 有: 以上等式中最后面的括号是布尔表达式,Tom 想知道S[n] mod 233333 的值是多少。 Tom 最近在研究回文数字。 假设 阅读全文
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题目: 题目背景 NOIP2015 提高组 Day2 T2 NOIP2015 提高组 Day2 T2 题目描述 有两个仅包含小写英文字母的字符串 A 和 B 。现在要从字符串 A 中取出 k 个互不重叠的非空子串,然后把这 k 个子串按照其在字符串 A 中出现的顺序依次连接起来得到一个新的字符串,请 阅读全文
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题目: Problem Description Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each step 阅读全文
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题目: Problem Description This is a very simple question. There are N intervals in number axis, and M queries just like “QUERY(a,b)” indicate asking the 阅读全文
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题目: Problem Description The annual school bicycle contest started. ZL is a student in this school. He is so boring because he can't ride a bike!! So h 阅读全文