差不多，比较这个没什么意义
by zhy137036 @ 2020-07-04 17:39:23
@[Error_666](/user/91681) 几乎是O(1)吧
by WanderingTrader @ 2020-07-04 17:39:32
应该是O(1)，~~(a+b)是O(1)得到的吗？~~
by liujiageng @ 2020-07-04 17:40:42
O(1)
by _5011_ @ 2020-07-04 17:41:21
知道了，谢谢各位QWQ
by Error_666 @ 2020-07-04 17:42:10