dream of every cc coder that wont be fulfilled 
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If you can create a BFS, just test your code against that. This is even useful when in live competition. If not, take an AC solution and test it against yours.
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But say the problem is of graph theory. Then how will u generate random tc’s for this problem (taking into consideration that adjacency list has to be constructed) ?
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Just like the setter of the problem would create. 
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It’s a bit of a mess, but here’s my initial submission of BACREP, complete with brute-force implemention; optimised implementation, and testcase generator (search for --test).
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Bro but if u know what the edge cases are for the problem then do i even need to ask for help?
It’s not 100% guaranteed, but small-ish random testcases uncover edge-cases shockingly quickly in my experience. The only things they tend not to help with are:
- TLEs (obviously)
- Uncovering integer overflow, but there are other ways of detecting that.
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@ssjgz I agree with you but sometimes the error is just not visible to the eye even after testing 100’s of cases.
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I think that’s very rare, though; and it doesn’t have to be visible to the eye: as soon as the brute-force and optimised solutions don’t match, you have your testcase 
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Yeah it is but wouldnt it be so much convinient if an option like that did exist? And if other sites like codeforces can put an option like that then i guess that it might not be that hard? I may be wrong though.
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I think it’s probably a deliberate design decision, and one I agree with, frankly - people don’t give you nice, neat testcases in interviews, nor when you working as a programmer.
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@ssgz but say the constraints of the problem are 10^{18} and the brute force is O(N). And say my code is working for most of the tc’s except the large one > 10^9. Will i even have to optimise the brute force for that? And if yes then it’ll be really tiresome. Atleast for me. And believe me this error has happened with me a lot of time.
That generally doesn’t happen and the even never happened with me. If you write an optimised code that doesn’t work for n>1e9 , then there are high chances it will have a tc n<1e9 where it will not work.
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Yeah, as with @akshitm16, I can’t think of a time when the size of the testcase was the difference between AC and WA, except for cases of integer overflow, as mentioned 
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In my opinion, Code Chef should allow the people to view the test cases just like Code Forces does for the problems in the practice section. Even I have been struggling to find the test case where my solution is going wrong in ACCBIP problem from the previous Long Challenge.
EDIT - As far as the fact is considered that it happens very rarely, the issue is that when you get a verdict like that, it becomes super difficult for majority of the people to debug that case.
what are your views @everule1 @vijju123 @galencolin @therealnishuz @ssrivastava990 @admin @pushkarmishra
It will be dream only
why
see this problem statement and must see sample input output CodeChef: Practical coding for everyone
is there any limitations or community guidelines on codechef?
as platform there should be @admin please before having live at least review the problem statements, characters used in them !
Bro in one line : They don’t fulfill this condition.So just deal with it , if this happens almost everyone happy , but not gonna happen , so no hope.
When I mess up a problem on codeforces, I immediately see the test case for which my solution fails. Since that’s not possible on codechef, it allows me to think more about where I could go wrong.
Suppose that this happens to you:
Codeforces doesn’t allow you to see the full test case. In a case like this, there is no difference between the two sites.
And,
But I think that being able to download test cases is a nice idea.
Also, I’d like to have a ‘copy’ button which will let you copy the sample test cases.
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