How do you solve Generate Tag for Video Caption on LeetCode?

Generate Tag for Video Caption (LeetCode #3582) can be solved using Brute Force or Optimal Solution. The optimal approach is Optimal Solution with O(n) time complexity and O(n) space complexity. Key insight: CamelCase formatting requires careful handling of word boundaries.

What is the time complexity of Generate Tag for Video Caption?

The optimal solution for Generate Tag for Video Caption runs in O(n) time and uses O(n) space. The optimal solution processes each character once, making it linear in time complexity.

What is the brute force solution for Generate Tag for Video Caption?

The brute force approach for Generate Tag for Video Caption is Brute Force, with O(n²) time complexity and O(1) space complexity. This approach processes each character and word multiple times, leading to inefficiency. We will iterate through the string, cleaning and formatting it step by step. The optimal Optimal Solution approach improves this to O(n).

What algorithm or data structure is used to solve Generate Tag for Video Caption?

Generate Tag for Video Caption uses the following concepts: String, Simulation. The recommended patterns to study are: String Manipulation, Character Processing.

What are the interview tips for Generate Tag for Video Caption?

Clarify the requirements before coding. Discuss edge cases like empty strings or special characters. Explain your thought process while coding.

What are common mistakes when solving Generate Tag for Video Caption?

Forgetting to handle empty words after cleaning. Not truncating the result to 100 characters.

#3582

Generate Tag for Video Caption

Easy

StringSimulationString ManipulationCharacter Processing

LeetCode ↗

Approaches

Brute ForceOptimal

Complexity Comparison

	Brute Force	Optimal Solution★
Time	O(n²)	O(n)
Space	O(1)	O(n)

💡

Intuition

Time O(n)Space O(n)

This approach processes the string in a single pass, efficiently cleaning and formatting it without unnecessary iterations.

⚙️

Algorithm

3 steps

1Step 1: Initialize an empty result string with '#'.
2Step 2: Iterate through each character, building words and applying camelCase formatting.
3Step 3: Append the formatted words to the result and truncate to 100 characters.

solution.py13 lines

1def generate_tag(caption):
2    result = '#'
3    word = ''
4    for char in caption:
5        if char.isalpha():
6            word += char.lower()
7        else:
8            if word:
9                result += word[0] + word[1:].capitalize()
10                word = ''
11    if word:
12        result += word[0] + word[1:].capitalize()
13    return result[:100]

ℹ

Complexity note: The optimal solution processes each character once, making it linear in time complexity.

1CamelCase formatting requires careful handling of word boundaries.
2Removing non-letter characters is crucial for valid tags.

Solutions and explanations are original Tejav content. Problem titles © LeetCode — use the LeetCode button above for the full problem statement.