In the last round #850, when solving problem D of div.1 1785D - Wooden Spoon, I submitted the code with language C++17, using fast fourier transformation (although it's not the intended solution, but its time complexity is correct), but it gave TLE on pretest 20 (which is $$$n=20$$$).
After the contest, I resubmitted the same code with language C++20, and it shown Accepted with the execution time of only 1434ms! So I wonder why there's such a big difference between these two languages, and I want to know whether I can request a rejudge in such kind of situations.
