摘要: #include <iostream> #include <algorithm> using namespace std; typedef long long LL; const int N = 100010, mod = 1e9 + 7; int fact[N], infact[N]; int q 阅读全文
posted @ 2022-11-18 22:34 nobodyL 阅读(30) 评论(0) 推荐(0)