Everyone has a bad day from time to time... It took me 16mins to solve problem A, had many bugs, and a very stupid one in problem F. I apparently fixed the bug, but didn't submit Problem F until after the contest thinking it will give me a WA again. It turns out it got AC with just two characters fix...
Timestamps 🕓:
0:00 Intro
1:14 Problem A
18:00 Problem B
24:39 Problem C
32:58 Problem D
49:30 Problem E
1:09:40 Problem F
2:18:10 Explanations
2:45:32 Problem F gets AC with no changes