2021牛客暑期多校训练营3 E. Math(数论/韦达定理)
链接:https://ac.nowcoder.com/acm/contest/11254/E 来源:牛客网 题目描述 Given n, count the number of pairs of p ...
链接:https://ac.nowcoder.com/acm/contest/11254/E 来源:牛客网 题目描述 Given n, count the number of pairs of p ...
链接:https://ac.nowcoder.com/acm/contest/11255/E 来源:牛客网 题目描述 Bob has a tree with nn nodes and the we ...
A. R 链接:https://ac.nowcoder.com/acm/contest/23479/A 来源:牛客网 题目描述 小红拿到了一个长度为 nn 的字符串,该字符串仅由大写字母组成 ...