asimaries's blog

Why TLE?
By asimaries, history, 2 years ago, In English

https://codeforces.com/contest/1691/submission/159098417

Why does this solution fail on test 30 (TLE)? this is an O(n) solution and also this shouldn't have run more then O(1) time complexity.

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2 years ago, # |
← Rev. 4   Vote: I like it 0 Vote: I do not like it

This TLE is repeated more and more nowadays in codeforces and the reason is same.
I just replace unordered_map with map and it get accepted
unordered_map cause TLE because of its bad hashing function, but to override this you can check this blog for most efficient custom hashing.

upd: accepted code using unordered_map with custom hash.

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    2 years ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    Thank you very much I thought using using unordered_map will give me a lesser time complexity

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