摘要：
The binomial coefficient C(m, n) is defined as C(m, n) = m! (m − n)! n! Given four natural numbers p, q, r, and s, compute the the result of dividing 阅读全文
摘要：
https://vjudge.net/contest/176767#overview A - A Spy in the Metro B 最长递增子序列变形 C D E G H I I 树形DP 阅读全文