Suggest some test cases which you think is failing

https://www.codechef.com/viewsolution/28166150
I think every think everything is all right…

What is the largest value of N that can be provided as input?

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1 ≤ N < 10^5

For LUCKY5? Read the constraints again :slight_smile:

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I changed my approach by using strings which qualified all the constraints and got the answer right but I want to know what changes you would have made in the code (link above) to get answer right ie >>1 ≤ N < 10^5 by using int ???

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I’d simply use strings - 10^{100000} is far too big to fit into any built-in datatype. string is perfect for this question as there is no arithmetic involved, and all we care about is the value of each digit, which is easily obtained from a string :slight_smile:

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thanks for replying my posts every time:grinning::grinning:

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