Opening the reading…

First and Last Positions of Every Character — drill-1 — LearnYard

03 Dsa FundamentalsString BasicsFind the First and Last Index of Occurrence for Each Character in a String

Lesson · no judge

1 of 4 parts done

1/4

DSA FUNDAMENTALS › STRING BASICS

Write it, run it, read the output

Reading · 6 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

Scan the string "banana" once using ASCII-indexed first and last arrays. Set each first position only once, update each last position on every occurrence, then print the present characters in ASCII order as "a 1 5", "b 0 0", and "n 2 4".

C++

Loading editor…

OUTPUT

Sample

a 1 5
b 0 0
n 2 4

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

Previous · Check if There are Two or Three Consecutive Identical Characters in a String3 parts left before this item is marked done.Next part · Code drill 2

AI TUTORTalk to tutor

Scoped to Find the First and Last Index of Occurrence for Each Character in a String. The tutor can see the reading, its checkpoints and your drill code.

The tutor reads this lesson alongside you and answers questions about it — nudging you towards the answer rather than handing it over.

The tutor will not answer a quiz question for you, and it will not paste a working drill. It explains the reading it can see.