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First Non-Repeated Character | Dataford Interview Questions

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Asked 1mo ago|

Veeva Systems

Veeva Systems

First Non-Repeated Character

Easy

Hash Tablesfrequency countStrings

Problem

Problem

Given a string s, return the first character that appears exactly once in the string. If no such character exists, return an empty string "". The algorithm should preserve the original order of characters when deciding which unique character is first.

Constraints

0 <= len(s) <= 10^5
s contains printable ASCII characters
Return the character itself, not its index

Problem

Problem

Given a string s, return the first character that appears exactly once in the string. If no such character exists, return an empty string "". The algorithm should preserve the original order of characters when deciding which unique character is first.

Constraints

0 <= len(s) <= 10^5
s contains printable ASCII characters
Return the character itself, not its index

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