Took me a whole night to solve the question and it turns out that it was copied! Did not expect this really. It takes a lot of hard work to arrive at a solution, please make sure the efforts don’t go in vain next time.
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It took me 2 days to arrive at its solution as well. Though I didn’t submit. Fml.
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Goodbye TANDON !!!
…
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Does anyone know where was it copied from??
Ironical how this time one of the problem setters itself was involved in plagiarism 
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Will they get a rating drop as well?
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Doh - and I was 10 seconds away from solving it 
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Or probably give us all an increase. Bonus points anyone? 
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That won’t matter🤣 rating system is relative
I know right. But at least we can brag about it 
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Ab jisne nhi bhi kiya hoga, vo bhi bolega,mera hone hi waala tha, so easy,etc…
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Last year, in OCTOBER challenge, they removed challenge problem after extending it for a week.
This year in OCTOBER challenge, TANDON removed.
RIP OCTOBER.
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bahut is easy tha bhai dekthe hi code kar diya tha lol
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Haan, bhai, k=7 ko dekhte hi ek second mai code likh diya tha maine toh…
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Maine toh pseudo code hi submit kar diya aur 100pts !
…Easy question
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I solved it for all the K but 7.
Now that it has been removed, could someone explain the divisibility criteria used for K = 7?
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Guess what? Maine toh question hi submit kar diya aur AC! Plagiarism mein plagiarism. Nesting hacked 
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For k=7, we make 6-different matrices of size-49cross49, then do matrix exponentiation of each of them, after that multiply all of them to get a(0)(0)… All hard work went to vain…
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All other k’s in the questions were a joke. Only thing to solve was for k=7
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Can you tell the approach for this problem ?
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