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Compare Version Numbers

Explore how to compare version numbers by analyzing revisions separated by dots and converting them into integers. Learn to apply the two pointers approach to efficiently traverse and compare each revision, handling cases where version strings have different lengths. This lesson prepares you to implement a robust version comparison solution in coding interviews.

Statement

Given two version strings, version1 and version2, compare them. A version string is composed of revisions separated by dots ('.'). Each revision’s value is determined by converting it to an integer, disregarding any leading zeros.

Compare the two version strings by evaluating their revision values from left to right. If one version string contains fewer revisions than the other, treat each missing revision as 0.

Return the result of the comparison as follows:

  • Return 1-1 ...