Count Numbers With One Different Digit

capitalone Given an array of numbers, count the pairs of numbers that have the same number of digits but differ by exactly one digit. Input: An array arr of positive integers, where each element is a number Output: The count of number pairs that satisfy the condition Example: Input: [123, 124, 321, 423, 456] Output: 2 Notes: Pairs like (123, 124) and (123, 423) satisfy the condition Pairs like (123, 321) do not satisfy the condition as they differ by more than one digit Constraints: The array has a positive length All numbers have the same digit-length Example Input [123, 124, 321, 423, 456]