Concatenate Unique Characters

Create a string concatenating the unique characters from multiple strings.

Easy12/16/2023

Problem statement

Given a string, return a string containing all the unique characters from that string, order matters. The input will be given as a single line.

Problem leaderboard

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#1
27 c.
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Rusty
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maximec-indy
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olivernybo
#3
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Arnaud