iscsi's blog

different time limits
By iscsi, 15 years ago, In English

Hi,

I would like to ask what is the difference 1,5 sec, 2 sec and 3 sec time limits? :)
I see some example has different time limits but I don't see when I read the problem how should I use this information? I think the memory limit is easier to calculate of course, but I can't use this time limit information.
Could you give me some idea?

thanks,

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15 years ago, hide # |
 
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You have to check the complexity of your algorithm, for example... if you write a O(N3) algorithm and the maximum value of N is 300, then the number of "simple steps" that the algorithm will make is 27.000.000 (easily fits in 1 second time limit)

The reference is: 100 millions operations per second
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  • 15 years ago, hide # ^ |
     
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    I think you are forgot the constant from the big-Oh.. So the best way I should calculate the simple steps exactly before I implement my solution and check is it less then the time limit *10^9?
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    • 15 years ago, hide # ^ |
       
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      Yes, but it is 108
      Anyway a better reference would be: not more than 108 operations (with a very small constant factor)
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