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NeetCode 150 / Arrays & Hashing
01.08 · Problem

Encode and Decode Strings

Medium Length-prefixed encoding 1 video LC 271 Pro

This problem is part of solulu Pro

Design a Codec that turns a list of strings into one string and back. encode(strs) returns a single string; decode(s) must return exactly the original list. The strings may contain any printable characters, including…

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Item 8 of 9 · updated 2026-10-12