dev_il's blog

Getting TLE on 433B problem
By dev_il, 9 years ago, In English

Problem: 433B - Kuriyama Mirai's Stones

This is my solution: 11326002

I use partial sums for initial array and then for sorted. Don't understand where can be a bottleneck.

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9 years ago, # |
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Your approach and implementation of the problem are correct but you seem to use scanner class for taking input which is slow (though i am not a regular JAVA user but that is the only fault i can find in your code) . Try to use faster I/O methods. I think it will get accepted after that because your approach and implementation are correct. For faster I/O you can refer to codes of top rated coders who use JAVA as their language.

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    9 years ago, # ^ |
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    Oh, thank you very much. I think you are right. I even forgot about FastScanner.

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9 years ago, # |
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The bottleneck is quite well-known. Should not use Arrays.sort for primitive types.

http://codeforces.net/contest/433/submission/11329247

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    9 years ago, # ^ |
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    And so how to sort arrays?

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      9 years ago, # ^ |
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      Shuffle before sorting or use Objects.

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        9 years ago, # ^ |
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        How shuffling can help in this case? Arrays.sort function never wraps primitive type in Integer/Long objects.

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    9 years ago, # ^ |
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    I will answer here.

    Because ArrayList is a list of Objects. You can't create ArrayList< int >.

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