devil_within has surprisingly solved E problem of Codeforces Round #651 (Div. 2) using KOTLIN, although his primary language is C++ only. Just look at his submissions and see yourself that he has more than 240 submissions in C++ language and just 2 in KOTLIN. These is his KOTLIN Submission. 84500251 Looking closely and comparing it with his C++ submissions one can easily see that there's a huge difference of coding style of this submission and his other submissions. I don't see a good enough reason to suddenly switch to a completely different language that too in middle of contest. The only logic I can make from this situation is that he most probably took help from some of his friends who code primarily in KOTLIN. Or he just asked them to code the solution and he copy pasted their solution in KOTLIN.

devil_within do you have any logical argument on why this has happened?