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A question about time complexitiy
By tianxiawoyou, history, 4 years ago, In English

In Codeforces Round 635 (Div. 2) ,I tried to hack this submission 76834239 but failed.

His time complexity seems to be $$$O(Td)$$$

The hack I used was

$$$1000$$$

$$$1\space 1 \space 1\space 10^9$$$

$$$1\space 1\space 1\space 10^9$$$

$$$1\space 1\space 1\space 10^9$$$

$$$\dots$$$

Why would this fail?

Does it have something to do with the language he chose?

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4 years ago, # |
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I think it's because on Codeforces, O2 is always turned on.

On my computer, if I choose O2, it seems that the complexity has been optimized to $O(1)$。

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