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The Lone Traveler
A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- easy
- Seniority
- junior, mid
Problem
Given a string, find the first character that does not repeat anywhere else in the string. Return that character. If every character repeats at least once, return an empty string.
Practice This Problem
Solve this Python problem with real code execution. DataDriven runs your Python code in a sandboxed Docker environment and grades it instantly.