(Successful) Leetcode: 1238 Circular Permutation in Binary Representation

Video Chapters

• 0:00 The Challenge Begins: Tackling Circular Permutations!
• 1:08 Unpacking the Mystery: Key Rules for Binary Permutations.
• 2:15 Laying the Foundation: Building Our Python Solution.
• 3:20 The Heart of the Algorithm: Designing Backtracking Logic.
• 7:00 Crafting the Rules: What Makes a Valid Permutation Step?
• 8:30 The Circular Twist: Connecting Start and End.
• 10:00 Diving into Recursion: The Power of Backtracking.
• 13:40 A Critical Catch: Unmasking a Sneaky Bug!
• 20:00 Success... Or Is It? Facing a Performance Wall.
• 20:50 The Next Frontier: Optimizing for Speed with AI Insights.

Original Output

0:00 The Challenge Begins: Tackling Circular Permutations!
1:08 Unpacking the Mystery: Key Rules for Binary Permutations.
2:15 Laying the Foundation: Building Our Python Solution.
3:20 The Heart of the Algorithm: Designing Backtracking Logic.
7:00 Crafting the Rules: What Makes a Valid Permutation Step?
8:30 The Circular Twist: Connecting Start and End.
10:00 Diving into Recursion: The Power of Backtracking.
13:40 A Critical Catch: Unmasking a Sneaky Bug!
20:00 Success... Or Is It? Facing a Performance Wall.
20:50 The Next Frontier: Optimizing for Speed with AI Insights.

Timestamps by StampBot 🤖

Unprocessed Timestamp Content

0:00 Ready to re-attempt "Circular Permutation in Binary Representation" problem!
0:30 Last night's ChatGPT rescue; today, we're figuring it out ourselves.
1:08 Decoding problem conditions: permutation values, starting element, one-bit differences.
2:15 Setting up the Python solution framework with `lastNum` and a `bt()` function.
3:20 Contemplating the backtracking base case and selection loop logic.
5:40 Initializing `self.p` and `seen` set for tracking visited permutation numbers.
7:00 Defining validity: not seen and one bit difference from the previous element.
8:30 Understanding the circularity condition for the first and last elements.
10:00 Implementing the recursive call and the crucial 'undo' step in backtracking.
11:00 Finalizing the base case check: list full and circular condition met.
13:40 Debugging `lastNum` definition: Oops, it was 2*n, not 2^n!
15:20 Copying `is_one_bit_diff` helper from Copilot, because why not?
18:00 Fixing a syntax error related to `is_one_bit_diff` (needed `self`).
20:00 Compiling successfully, but output reveals a dreaded 'Time Limit Exceeded'.
20:50 Analyzing Copilot's suggested improvements for performance and return logic.

Timestamps by StampBot 🤖