The String Shrinker

A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

easy

Seniority

L4

Problem

Given a string, return its run-length encoding: each run of identical characters becomes that character followed by the count, except runs of length 1 which omit the count. For example 'aabcccccaaa' -> 'a2bc5a3'.

Summary

Compress the string. Shorter wins.

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