Leetcode Problem 2094. Finding 3-Digit Even Numbers

2094. Finding 3-Digit Even Numbers

Leetcode Solutions

Frequency Count and Iterative Combination

  1. Initialize a frequency array freq of size 10 to store the count of each digit in digits.
  2. Iterate over the digits array and increment the corresponding frequency count for each digit.
  3. Initialize an empty list result to store the valid even numbers.
  4. Iterate over all three-digit even numbers from 100 to 998 (inclusive): a. For each number, calculate the frequency of each digit in the number. b. Check if the number can be formed with the available digits by comparing the frequency of each digit in the number with the frequency in the digits array. c. If the number can be formed, add it to the result list.
  5. Sort the result list.
  6. Return the result list.
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Set-Based Unique Combination Generation

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