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Problem solution · Python

Most Popular Video Creator

Most Popular Video Creator: a Python solution using direct simulation. Learn the idea, check the complexity, and read the full code, with credit to walkccc LeetCode Solutions.

Technique
Direct simulation
Source
walkccc LeetCode Solutions
Length
34 lines
Start with the idea.

Try the problem first. If you get stuck, read the approach below, then write your own solution. The full code is at the bottom.

Approach

Direct simulation

For Most Popular Video Creator, the implementation follows the problem’s operations directly while maintaining only the state needed for the next decision.

  1. Translate each rule into one explicit state update.
  2. Maintain the invariant after every processed item.
  3. Return the accumulated state once all relevant input has been handled.

Code notes

  • 34 lines of Python from the credited upstream file 2456.py.
  • The implementation visibly relies on sequence storage.
  • No explicit loop blocks detected.

Complexity

Count the number and nesting of passes over the input, then include the maintained containers in the memory estimate.

Check the problem constraints before deciding whether this complexity will pass.

Source

Code and credit

This code comes from walkccc LeetCode Solutions by P.-Y. Chen (walkccc) and is used under the MIT licence.

Open problem ↗Original source ↗
Full codeMost Popular Video Creator · PythonPython
Use this to learn the idea, then write your own version.
class Creator:  def __init__(self, popularity: int, videoId: str, maxView: int):    self.popularity = popularity  # the popularity sum    self.videoId = videoId        # the video id that has the maximum view    self.maxView = maxView        # the maximum view of the creator  class Solution:  def mostPopularCreator(self, creators: list[str],                         ids: list[str],                         views: list[int]) -> list[list[str]]:    ans = []    maxPopularity = 0    nameToCreator = {}     for name, id, view in zip(creators, ids, views):      if name not in nameToCreator:        nameToCreator[name] = Creator(view, id, view)        maxPopularity = max(maxPopularity, view)        continue      creator = nameToCreator[name]      creator.popularity += view      maxPopularity = max(maxPopularity, creator.popularity)      if (creator.maxView < view or              creator.maxView == view and creator.videoId > id):        creator.videoId = id        creator.maxView = view     for name, creator in nameToCreator.items():      if creator.popularity == maxPopularity:        ans.append([name, creator.videoId])     return ans

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