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Shayan's blog

Codeforces Round 960 (Div. 2) — Video Tutorial
By Shayan, history, 4 hours ago, In English

1990A — Submission Bait

1990B — Array Craft

1990C — Mad MAD Sum

1990D — Grid Puzzle

1990E2 — Catch the Mole(Hard Version)

Not a formal proof! (please explain the formal proof of the algorithm in the comment section if you know that)

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3 hours ago, # |
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Congrats for reaching 10K dude <3

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    110 minutes ago, # ^ |
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    Thank you bro <3

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3 hours ago, # |
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Why video editorial?

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    3 hours ago, # ^ |
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    text editorials take time to complete , besides Shayan does some clean coding too , so its nice in the mean time.

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3 hours ago, # |
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Can someone please explain problem D? I understood everything in the editorial up until adding the second dimension to the dp array. I don't get that part, why do we add dp[i][j] where j can be {0,1,2,3}? And is there a way to solve this without adding this second dimension?

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3 hours ago, # |
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Problem D can be solved using greedy: https://mirror.codeforces.com/contest/1990/submission/271628945

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3 hours ago, # |
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The "A.Submission Bait" problem really lives up to its name

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2 hours ago, # |
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Problem D greedy solution with just 2 variables and one for loop: 271663296

Idea/Solution
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    113 minutes ago, # ^ |
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    Same idea here, but tracking column indices instead: 271665697

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    103 minutes ago, # ^ |
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    trash ass solution. clearly codeforces is not for u lil bluh

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      79 minutes ago, # ^ |
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      What didn't you like about it? Maybe we can improve if u tell us so.

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81 minute(s) ago, # |
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Please add Russian subtitles to the video

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