Yesterday, I took part in Codeforces Deltix Round Spring 2021 [Div.1 + Div.2], and happened something incredible.

I solved out the problem D and pasted the pretest(37), but I failed the system test(36).

My original code

Later accepted one

The two codes are almost the same. Is there something wrong with my original code, or is there anything else wrong with the platform?

Thanks.