用普通方法实现这种操作所需要的时间是O (N)(如果对100个整数进行求和需要1 ms，那么对200个整数进行求和就需要2 ms，依此类推)。

The time to do this in the regular way scales as o (n) (if it takes 1ms to add 100 integers, it takes roughly 2ms to add 200 integers, and so on).

youdao

下午，我采取了捕鱼工具和捕捞虾的河岸，因为我用的方法，可以很长一段时间，并依此类推，直至什么，等待着。

Afternoon, I took a tool to catch fish and shrimp fishing to the river bank, waiting for the method I used can be for a long time and so on, until nothing.

youdao