摘要: ```cpp #include using namespace std; typedef long long ll; typedef double db; const int N = 2e5 + 50; const int M = 1e5 + 50; const int Mod = 1e9 + 7; 阅读全文
posted @ 2023-07-28 18:52 RVG 阅读(38) 评论(0) 推荐(0)