ak2006's blog

By ak2006, 6 months ago, In English

Hello everyone,

I just started my YouTube channel in which I have started posting videos related to competitive programming.

My first playlist is on Dynamic Programming and I will be uploading solutions for 16 DP problems in the month of May (with videos coming every second day.)

This playlist is aimed at those who have a conceptual understanding of what DP is and want to raise their DP problem solving level so that they are able to solve medium level DP problems (of CF rating from 1600 to 2000).

Please have a look at my channel and consider subscribing if you like the content.

I have also uploaded a general video on how to get better at Dynamic Programming which should be helpful for all skill levels: How to get better at Dynamic Programming

The problem list is as under:

1) Flowers (Round 271 Div 2 D Rated 1700) — DP, Combinatorics, Prefix Sums

Problem Link

Video Editorial Link

2) Consecutive Subsequence (Round 479 Div 3 Rated 1700) — DP, Map Data Structure

Problem Link

Video Editorial Link

3) Sleeping Schedule (Round 627 Div 3 E Rated 1700) — Scheduling 2D DP

Problem Link

Video Editorial Link

4) Python Indentation (Round 455 Div 2 C Rated 1800) — DP, Prefix Sum Optimization

Problem Link

Video Editorial Link

5) Multiplicity (Round 523 Div 2 C Rated 1700) — DP, Number Theory, Memory Optimization

Problem Link

Video Editorial Link

6) Longest Regular Bracket Sequence (Beta Round 5 C Rated 1900) — DP, Stack Data Structure

Problem Link

Video Editorial Link

7) Bad Luck Island (Round 301 D Rated 1900) — DP, Probabilities

Problem Link

Video Editorial Link

8) Queries for Number of Palindromes (ACM-ICPC Elimination Round H Rated 1800) — DP, String Processing

Problem Link

Video Editorial Link

9) K-Periodic Garland (Round 642 Div 3 E Rated 1900) — DP, Prefix Sums

Problem Link

Video Editorial Link

10) Zuma (Round 336 Div 1 B Rated 1900) — Range DP

Problem Link

Video Editorial Link

11) Clear the String (Educational Round 61 Div 2 F Rated 2000) — Range DP

Problem Link

Video Editorial Link

12) Bottles (ACM ICPC NEERC J Rated 1900) — 3D DP; Greedy

Problem Link

Video Editorial Link

13) The Least Round Way (Beta Round 2 B Rated 2000) — Grid DP

Problem Link

Video Editorial Link

14) Yet Another Yet Another Task (Educational Round 88 Div 2 D Rated 2000) — DP; Kadane's Algorithm

Problem Link

Video Editorial Link

15) Working Out (Round 245 Div 1 B Rated 1600) — Grid DP

Problem Link

Video Editorial Link

16) Modulo Sum (Round 319 Div 2 B Rated 1900) — DP, Prefix Sums, Pigeonhole Principle

Problem Link

Video Editorial Link

17) Fixed Points (Round 734 Div 3 E Rated 2000) — 2D DP

Problem Link

Video Editorial Link

18) Moamen and Xor (Round 737 Div 2 C) — DP, Combinatorics, Bitmasks

Problem Link

Video Editorial Link

19) Up the Strip (Round 740 Div 2 D1 + Hint for D2) — DP, Binary Indexed Tree

Problem Link

Video Editorial Link

20) Book (Round 743 Div 2 C / Div 1 A) — DP, Topological sorting of a Directed Graph

Problem Link

Video Editorial Link

I am a high schooler who enjoys CP. I qualified for IOITC 2021 (in 9th grade); have a Codechef max rating of 1965 and a Codeforces max rating of 1748.

Edit:

Added a general video on how to get better at DP

 
 
 
 
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6 months ago, # |
  Vote: I like it +3 Vote: I do not like it

Very much thanks!

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6 months ago, # |
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Love u Bro

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6 months ago, # |
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please continue to post such explanations Thank you very much

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5 months ago, # |
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All are Quality Problems. Nice Content.

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5 months ago, # |
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I would like to recommend 730J (rated 1900). One of the best DP problems I came across.

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5 months ago, # |
  Vote: I like it +3 Vote: I do not like it

Thanks for Providing Good Content

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5 months ago, # |
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Please attach a link to each problem for practicing

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5 months ago, # |
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Can you also add div2 A,B and C problems, I do find them difficult unlike the majority of the community, I often struggle with them especially B and C. Loads of thanks.

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    5 months ago, # ^ |
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    I plan to do problem Cs from recent contests if there is an interesting idea to share.

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5 months ago, # |
  Vote: I like it +4 Vote: I do not like it

Good work ak2006 keep it up.

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5 months ago, # |
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Good Going!! Thanks for the resources.

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5 months ago, # |
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I'm going through your playlist and haven't finished it yet so don't know if this type of bugaboo is covered, but I found it interesting. Bugaboo

Great job creating this playlist though!

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    5 months ago, # ^ |
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    You can check out the official video editorial for that particular problem. Yes my playlist does cover similar problems to that one.

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3 months ago, # |
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Thanks a lot!