Leetcode Problem 423. Reconstruct Original Digits from English

423. Reconstruct Original Digits from English

Leetcode Solutions

Key approach of the solution.

  1. Create a hashmap to count the frequency of each character in the input string.
  2. Identify unique characters for each even digit and count their occurrences.
  3. Use the counts of unique characters to determine the frequency of even digits.
  4. Subtract the characters used for even digits from the hashmap.
  5. Identify unique characters for the remaining odd digits and count their occurrences.
  6. Use the counts of unique characters to determine the frequency of odd digits.
  7. Construct the output string by appending the digits in ascending order according to their frequencies.
  8. Return the output string.
UML Thumbnail

Alternative approach using full digit reconstruction

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...