Write it, run it, read the output

Reading · 4 minQuiz · 5 questions2 code drills · run only

This is a scratch drill — your code runs, nothing is graded or recorded. No test cases, no expected output, no verdict.

TASK

Write the missing logic for [4, 2, 4, 7, 2, 2, 9]. Scan earlier indices to skip values already seen, scan the full array for each first occurrence, and print each distinct value in exactly one counter.

C++

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OUTPUT

Sample

Unique: 2
Duplicate: 2

What a finished answer prints, from the lesson. Nothing has run yet — press Run and this is replaced by your program’s own output.

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