Dsa
Hashing
Easy
Employee ID Validation
You are given a list of employee IDs. Your task is to determine if there are any duplicate employee IDs. If duplicates exist, print 'Duplicate IDs found' and if not, print 'All IDs unique'.
Input format:
- The first line contains an integer n, the size of the list.
- The second line contains n employee IDs.
Output format:
- Print 'Duplicate IDs found' or 'All IDs unique'.
Example:
Input:
5
E123 E456 E789 E123 E000
Output:
Duplicate IDs found
Key concepts
hashingsetsvalidation
Practise this out loud — free
Start a mock interview on THIS exact question — a voice AI interviewer opens with it, pushes back like a real onsite, then hands you an instant scorecard.
🎙 Practise this question now