darkcry's blog

Getting Wrong answer on codeforces but correct answer in my system.
By darkcry, history, 5 years ago, In English

So i am solving a question named verse for santa of educational codeforces round 79. I have written my code using binary search https://codeforces.net/contest/1279/submission/79356510 The problem is for the testcases give in the question my code is giving the correct answer on my system(I code on jdoodle Online C++ 14 Compiler IDE), but giving different answer when i am submitting it to codeforces. Please help!

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5 years ago, # |
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Did you consider different sizes of data types on your system and codeforces?

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    5 years ago, # ^ |
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    what do you mean?

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      5 years ago, # ^ |
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      Maybe your system is 64-bit while codeforces is 32-bit (actually I know nothing about codeforces, just a guess).

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5 years ago, # |
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I guess your variable 'ma' has not been assigned yet.

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    5 years ago, # ^ |
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    No i checked it is fine.

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      5 years ago, # ^ |
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      when i > 0, you compare v[i] and ma. But in this case, ma has no assigned value. It may lead to 'undefined behavior'

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        5 years ago, # ^ |
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        but before that i am assigning a value to ma when i=0. So there is no undefined behavior. If you still have doubt copy my code, run on your system for the first test case .

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          5 years ago, # ^ |
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          How to say??? You declare int ma, index; inside the loop. Thus, once you iterate i, the variable 'ma' is declared again. Plzz

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          5 years ago, # ^ |
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          ma is redefined on each iteration and has no assigned value on iterations 1+.

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          5 years ago, # ^ |
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          you should declare 'ma' outside the loop!

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            5 years ago, # ^ |
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            Yes apologies. I was wrong . It solved the problem. Thnak you!!! :)

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3 years ago, # |
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Same problem for me in this submission: 134321653. When I build and run this code in geany on ubuntu I get correct output, but when I submit it on codeforces it looks like I didn't output anything.

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    3 years ago, # ^ |
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    Don't use ios_base and cin.tie(0) with scanf together.

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      3 years ago, # ^ |
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      Wow that was fast reply! Thank you so much, you solved my issue. :D

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6 months ago, # |
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hey, I am also getting the same issue in Codeforces Round 944 (Div. 4), for Eth problem on 21th testcase I am getting wrong output but when I run it on some other compiler for the same testcases it shows correct output, this is my submission 260484076

please help

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6 months ago, # |
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same shit bro, i already write blog about it some time ago, and not one gived clear solution

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