Two Sum and Array Length | Dataford Interview Questions

Jio backend services may need to identify two values in an array that match a required total. Given an integer array and a target, return the indices of the two distinct elements whose values add up to the target, together with the array length.

Use a single left-to-right pass when possible. The array length must be obtained efficiently using Python's built-in len operation, which runs in O(1) time for a list. Do not use the same element twice.

Formal Specification

Implement two_sum_with_length(nums, target).

Input: nums, a list of integers, and target, an integer.
Output: A two-item list containing the pair of indices in increasing discovery order, followed by the length of nums, represented as [indices, length].
The input is guaranteed to contain exactly one valid pair.

Constraints

2 <= len(nums) <= 10^4
-10^9 <= nums[i] <= 10^9
-10^9 <= target <= 10^9
Exactly one valid pair exists
The same index cannot be used twice

Function Signature

def two_sum_with_length(nums, target):

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