qwertsboy1234's blog

MY PREDICTION FOR TODAY'S B PROBLEM
By qwertsboy1234, history, 6 years ago, In English

Many codes are going to fail system test today for the problem B of contest Codeforces round 717.Its my prediction,let's see what happens.

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6 years ago, hide # |
 
Vote: I like it +47 Vote: I do not like it

Nice

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6 years ago, hide # |
 
Vote: I like it +11 Vote: I do not like it

gg :(

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6 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

orz

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6 years ago, hide # |
 
Vote: I like it +35 Vote: I do not like it

What if you are mohammedehab2002's alt account and you knew pretests were weak? :)

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6 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

I'm curious to know what motivated you to picking problem B as that special problem

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    6 years ago, hide # ^ |
     
    Vote: I like it +6 Vote: I do not like it

    This seems to always happen with bruteforce range condition problems, as people always submit cheese sols. But perhaps there is something more?

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      6 years ago, hide # ^ |
       
      Vote: I like it 0 Vote: I do not like it

      I failed it(I qualify as a cheese sol writer)can you tell me how not to approach such questions or how to do so. What to avoid and all.

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    6 years ago, hide # ^ |
     
    Vote: I like it 0 Vote: I do not like it

    In my case, I mistakenly wrote a[i] in place of a[j] at one place and still my code passed pretest 2 and 3.

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    6 years ago, hide # ^ |
    ← Rev. 2  
    Vote: I like it +9 Vote: I do not like it

    The reason i came to know because usual b problems for which answer is boolena type i.e yes or no 10^4 test cases are checked,but today only 5 test setseach having maximum 15 with 1 having just 2 test cases thus total mybe max 62 which is very very very less number of test cases to be checked for boolean type problems.

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6 years ago, hide # |
 
Vote: I like it +42 Vote: I do not like it

CF FST-Predictor

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6 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

I initially thought that Xor of array should be 0. I got wrong answer on pretest 3. I was thinking of a counter case and then realize of a countercase like this and corrected myself:

4

3 3 3 0

Guess what the above case was the hack XD.

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6 years ago, hide # |
 
Vote: I like it +8 Vote: I do not like it

That is why I did stress testing already.

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