Quick Overview

Given a list of integers, count the index pairs whose values are equal or become equal after swapping two digits inside one of the two numbers, where leading zeros created by a swap are dropped. It tests digit manipulation, careful handling of numbers with different lengths, and hashing to avoid comparing every pair.

Count Pairs of Numbers That Become Equal After at Most One Digit Swap

Company: Capital One

Role: Machine Learning Engineer

Category: Coding & Algorithms

Difficulty: hard

Interview Round: Technical Screen

Overview: Given a list of integers, count the index pairs whose values are equal or become equal after swapping two digits inside one of the two numbers, where leading zeros created by a swap are dropped. It tests digit manipulation, careful handling of numbers with different lengths, and hashing to avoid comparing every pair.

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