How do I practice coding and algorithm questions?

Use PracHub's coding console to write, test, and debug your solutions in Python or JavaScript. View hints, test against sample inputs, and compare with official solutions.

What difficulty level is this coding question?

This is a hard difficulty Coding & Algorithms question, commonly asked during Onsite rounds at Meta.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Meta during technical interviews.

Count three-digit numbers with distinct digits

Quick Overview

This question evaluates a candidate's understanding of digit manipulation, basic combinatorics, and implementation of value-range constraints in coding problems. As a Coding & Algorithms problem it is commonly asked because it reveals attention to edge cases and correctness when counting under bounds, testing practical implementation skills rather than purely theoretical reasoning.

hard
Meta
Coding & Algorithms
Software Engineer

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