Give some hints for problem solving

I have tried a lot for this Question but my answer is not accepted by Gonitzoggo. Please give me some hints.

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Gonitzoggo also don’t take my answer. I think it is some kind of glitch

@moderators hello, kindly check this problem.

Yes, I think there is some machine error in this problem.

There has been a lot of reports regarding this problem and our academic team has checked it multiple times. So I can confidently say the answer is not 69.

But I have also checked it that I get the answer 69. I also checked by python programming. I think there something wrong like instead of 2017, there will be any other number or similar error .

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@Gomuj bhai the code looks legit to me. the algo is pretty much self-explanatory.

এই প্রব্লেমে উত্তরে ভুল ছিলো, আমরা সলিউশন আপডেট করে দিচ্ছি। এখন গিয়ে সাবমিট দেবার চেষ্টা করুন।

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But many users solved this problem at past. But how?

Our best guess is that they used bruteforce.