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. Though my algorithm is to solve the problem randomly, it shouldn't exit a the time of 1.6s. Is there something wrong with my original code, or is there anything else wrong with the platform?

Thanks.