摘要: #include <iostream> #include <cstdio> using namespace std; const int maxn=5e5+10; long long a[maxn],c[maxn]; inline int lowbit(int x) { return x&(-x); 阅读全文
posted @ 2019-09-19 20:36 wyhbadly 阅读(86) 评论(0) 推荐(0)