How fast is CF Judgers?
How long will it run a program (in C++) that its time complexity is $$$O(N)$$$ and $$$N = 10^8$$$? What about $$$N = 10^9$$$?
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Auto comment: topic has been updated by xcx0902 (previous revision, new revision, compare).
It depends on a lot of factors, but, as a rule of thumb, 10 ^ 8 operations are done in 1 second.
You are wrong. Now that number is 10^9, or at least 4 * 10^8
You can easy check it by yourself. For example in such way: https://codeforces.net/contest/1702/submission/165129718
It isn't actually important what is the time complexity, but how many operations you perform.
Before you ask about judger performance, learn some faster algorithms.
https://codeforces.net/blog/entry/21344
Might help if you want to know "How to determine the (expected) complexity of expected solution of a problem by looking at its constraints?"