摘要: 7.9 线段树1(区间加,区间求和) #include<cstdio> #include<iostream> #define re register #define ll long long #define maxn 200020 #define ls p<<1 #define rs p<<1|1 阅读全文
posted @ 2022-07-09 21:03 __Liuz 阅读(32) 评论(0) 推荐(0) 编辑