LeetCode Weekly Contest 175 (3rd) + Explanations

Got 3rd this time, not bad! Anyways, explanations start at 20:35. If they are a bit unclear, feel free to ask questions in the comments below so that I can improve!

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[sankalptiwari]

These are really helpful. Appreciate the efforts you are putting for the growth of community

[poorgang]

Did you finish the “Junior training sheets” of Mostafa saad Ibrahim?

[zhenweihu]

Thanks a lot William! It is a nice trick to use the vector "bs" in Q4!

[shmaestro]

Thanks for the excellent videos! For #4, is it similar to the N-queens problem (recursion)? Basically given this is at max 8x8, could we just use recursion here instead of dp?

[saikatify]

These videos are really helpful ! Will you be making a video for today's AtCoder and CodeForces contest as well ?

[RishabhSharma]

Which laptop/ computer do you use ? Just wanted to know.

[reddynishanth]

What keyboard are you using? The sound it makes while you type is awesome.

[bensonyuan]

恭喜! I have a Q, can every backtracking search problem be DPed as such? If not, what property of this problem makes DP possible?

[michaelcao]

Really good explanations. Thanks for the video.

[josephwong]

Tweets implementation would be difficult in a whiteboard interview !!