摘要: #include<bits/stdc++.h> #define ull unsigned long long using namespace std; const int N=262150,mod=998244353,g=3,invg=(mod+1)/3,inv2=(mod+1)/2; int re 阅读全文
posted @ 2024-02-29 21:46 zhicheng123 阅读(34) 评论(1) 推荐(0)