Скачать или смотреть Codeforces Round 767 Solutions and Screencast

Good morning! Solutions to Div2 A and B, as well as Div1 A-D1 are all available at the end of the video. I had a pretty solid performance today, getting mostly everything in my difficulty range except for D2 which I wasn't able to figure out in time. Back to IM, one step away from Red Redemption!

I had the correct solution to problem D2 super early in contest written on paper, but I didn't read the constraint that the sum of n was going to be small, and the fact that there were 10^5 test cases made me incorrectly think that an O(n) solution would TLE.

Timestamps:
Timestamps:
0:00 Good morning
0:10 Solving A
9:59 Solving B
29:49 Solving C
1:00:11 Solving D1
1:20:59 Not solving an impossibly hard version of D2
1:55:38 Reading E
2:01:50 Div2 A Solution
2:02:55 Div2 B Solution
2:05:54 Div1 A Solution
2:12:50 Div1 B Solution
2:18:42 Div1 C Solution
2:27:45 Div1 D Solution