Recently, I faced with one issue where two seemingly similar solutions performed differently. I want to know why it is happening?↵
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[Code 1](http://mirror.codeforces.com/contest/2057/submission/300094846): Used an XOR operation (num ^ some_randint) to preprocess numbers before counting their frequencies ↵
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[Code 2](https://mirror.codeforces.com/contest/2057/submission/300094222): Counted numbers directly without any transformation.↵
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Both codec followed identical logic after this step, but code 1 passed the test cases efficiently, while code 2 gotaTLE.↵
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WHY? I would be happy if someone could explain.
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[Code 1](http://mirror.codeforces.com/contest/2057/submission/300094846): Used an XOR operation (num ^ some_randint) to preprocess numbers before counting their frequencies ↵
↵
[Code 2](https://mirror.codeforces.com/contest/2057/submission/300094222): Counted numbers directly without any transformation.↵
↵
Both codec followed identical logic after this step, but code 1 passed the test cases efficiently, while code 2 gotaTLE.↵
↵
WHY? I would be happy if someone could explain.
