摘要:
https://acm.ecnu.edu.cn/contest/448/problem/A/ \(a + k\sqrt b \Rightarrow (a+k\sqrt b) \cdot (A+K\sqrt b)= aA+kKb+(aK+kA)\sqrt b\) #include <bits/stdc 阅读全文
posted @ 2021-10-08 13:49
nekko
阅读(58)
评论(0)
推荐(0)
摘要:
https://acm.ecnu.edu.cn/problem/3314/ 二项式展开得: \[ \begin{aligned} &\sum_{i=0}^{n}a_i(x+A)^i \\ =&\sum_{i=0}^{n}a_i\sum_{j=0}^{i}{i \choose j} x^jA^{i-j 阅读全文
posted @ 2021-10-08 09:21
nekko
阅读(225)
评论(0)
推荐(0)

浙公网安备 33010602011771号