AboAbdoMC's blog

One quick question
By AboAbdoMC, history, 18 months ago, In English

why AC?

https://codeforces.com/contest/81/submission/177441374

shouldn't this be O(n^2)?

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18 months ago, # |
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I think so but it is an old problem so maybe bad test cases?

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    18 months ago, # ^ |
      Vote: I like it +2 Vote: I do not like it

    I tried it on my local machine with this testcase:

    "a"*100000 + "bc"*50000

    it passed in 200ms :)

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18 months ago, # |
  Vote: I like it +9 Vote: I do not like it

This solution uses ovidiush11's trick. String erase is apparently O(0). I hope he can explain with more details because I am not good enough for this obscure idea yet.

Marinush

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    18 months ago, # ^ |
      Vote: I like it +7 Vote: I do not like it

    what is O(0)

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      18 months ago, # ^ |
        Vote: I like it +18 Vote: I do not like it

      Takes exactly 0 time, else it can't be bounded above by a multiple of 0

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        18 months ago, # ^ |
          Vote: I like it +4 Vote: I do not like it

        Well, technically every code is $$$\Omega (0)$$$ ;)

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          18 months ago, # ^ |
            Vote: I like it -15 Vote: I do not like it

          Hi, your comment is not funny nor helpful. Next time, please refrain from writing such comments.

          Please, live a life.

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            18 months ago, # ^ |
              Vote: I like it +17 Vote: I do not like it

            Sure thing, you too :)

            Spoiler
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              18 months ago, # ^ |
                Vote: I like it -26 Vote: I do not like it

              Hi, your comment is not funny nor helpful. Next time, please refrain from writing such comments.

              Please, live a life.

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                18 months ago, # ^ |
                  Vote: I like it +8 Vote: I do not like it

                Hi, your comment is not funny nor helpful. Next time, please refrain from writing such comments.

                Please, live a life.

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18 months ago, # |
  Vote: I like it +9 Vote: I do not like it

It is $$$O(n^2)$$$, but all your operations are basically memcpy, so the constant factor is really small.

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18 months ago, # |
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order is n^2 but Coefficient is small

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