Leetcode Problem 248. Strobogrammatic Number III
Leetcode Solutions
DFS Generation and Range Checking
- Define a list of strobogrammatic pairs that can be used to form the numbers.
- Iterate over the range of lengths from
low.length()tohigh.length(). - For each length, perform a DFS to generate all strobogrammatic numbers of that length.
- In the DFS, add strobogrammatic pairs to the current number from the outside in.
- If the current length of the number is equal to the target length, check if it falls within the range
[low, high]. - If the number is valid, increment the count.
- Return the count after processing all lengths.
Iterative Counting with Strobogrammatic Number Generation
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