Leetcode Problem 2375. Construct Smallest Number From DI String

2375. Construct Smallest Number From DI String

Leetcode Solutions

Greedy Approach with Reverse Subsequences

  1. Initialize an empty string result to store the final output and an empty string stack to keep track of the current sequence of numbers.
  2. Iterate through the pattern, appending the smallest available number to stack for each character.
  3. If the current character is 'I' or it is the last character in the pattern, reverse stack and append it to result, then clear stack.
  4. After the iteration, if stack is not empty, reverse it and append to result.
  5. Return result as the final answer.
UML Thumbnail

Backtracking to Generate All Valid Sequences

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