This problem has been solved.
I can't submit my code for this. I guess the error is because that in the contest solutions can only be submited using kotlin 1.4, but there are only kotlin 1.6 and kotlin 1.7 in the language list now. Is it possible to change something a little? Apparently there are two ways to do this: 1. Add the language kotlin 1.4 to the language list again. 2. Change the rule of the contest a little, such as adding kotlin 1.6 or kotlin 1.7 to the language list for the contest.
because it's a surprise language.
But there are submissions until 2022 April
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Usually, when I wanna up-solve problems from such contests with only certain languages supported, for instance VK Cup 2012 Wild-card Round 1 or the one you mentioned. I do clone the contest to a mashup (you'd find on the rhs of page) and then I can submit in normally supported languages as c++. Check
I got this: You are not allowed to create mashup contests Maybe that's because I've participated too few contests, if my memory is right.
Yeah. Maybe, too few contests. But, I think if specialist or above then can do mashups.
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