Combinatorics - Topic Stream

You can watch all the topic streams in this playlist:
   • (Almost never on) Fridays Topic Streams  

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The link to the Codeforces Group:
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0:00 Intro
12:12 Combinatorics
13:05 Exponentiation in O(lgn)
25:37 How to get to Expert in 3 month - Video Teaser
28:12 Combination + Proof
39:15 Pascal's Equality - Algebraic + Combinatorial Proof
53:03 Second Problem with Combinatorial Proof
1:02:30 C(n, k) = C(n, n - k)
1:04:03 Third Problem with Combinatorial Proof
1:13:41 ChatGPT trolling me
1:23:00 Calculating Combination in Code
1:26:17 Calculating Combination using Fermat's Little Theorem
1:36:53 Make it Faster!
1:58:41 Solving 559C - Gerald and Giant Chess


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