PYTHON PROBLEM 093 · Intermediate

Find first and last occurrence

Find the full index range occupied by a repeated target.

binary search · boundarybinary searchboundary

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests find first and last occurrence. It belongs to the Algorithm Foundations: Arrays, Searching, Sorting, and Hashing roadmap and uses the binary search · boundary pattern.

Complexity, linear and binary search, sorted() trade-offs, prefix ideas, two pointers, sliding windows, and hash-map patterns.

COMPLETE WORKSPACE

Learn the plan, trace the logic and run the solution

Complete access unlocks the full statement, two verified examples, visual execution plan, hints, browser compiler, solution and line-by-line interpretation.

Unlock all 180 lessons · ₹599One full year · one payment · no automatic renewal

SKILL TO CARRY FORWARD

Pattern relevance

This exercise strengthens binary search · boundary. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.