摘要: #include<iostream> #include <algorithm> #define ls now<<1 #define rs now<<1|1 #define ll long long using namespace std; const int MM=1000005; ll n,x1, 阅读全文
posted @ 2021-09-28 13:54 T_X蒻 阅读(29) 评论(0) 推荐(0) 编辑