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Compare Version Numbers

Explore how to compare version number strings by breaking down each revision into integers and analyzing them from left to right. This lesson teaches you to handle missing revisions and use the two pointers method to efficiently traverse and compare version strings, preparing you to solve similar coding interview challenges.

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 ...