Leetcode Problem 1556. Thousand Separator

1556. Thousand Separator

Leetcode Solutions

Iterative Reverse and Insert Approach

  1. Convert the integer n to a string numStr.
  2. If the length of numStr is less than or equal to 3, return numStr as no dots are needed.
  3. Initialize an empty string result to build the output.
  4. Initialize a counter count to keep track of the number of characters processed.
  5. Iterate over numStr in reverse. a. Prepend the current character to result. b. Increment count. c. If count is a multiple of 3 and it's not the last character, prepend a dot to result.
  6. Return the result string.
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Divide and Conquer Approach

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