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Leetcode Problem 248. Strobogrammatic Number III

248. Strobogrammatic Number III

Leetcode Solutions

DFS Generation and Range Checking

  1. Define a list of strobogrammatic pairs that can be used to form the numbers.
  2. Iterate over the range of lengths from low.length() to high.length().
  3. For each length, perform a DFS to generate all strobogrammatic numbers of that length.
  4. In the DFS, add strobogrammatic pairs to the current number from the outside in.
  5. If the current length of the number is equal to the target length, check if it falls within the range [low, high].
  6. If the number is valid, increment the count.
  7. Return the count after processing all lengths.
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Iterative Counting with Strobogrammatic Number Generation

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