Quick Overview

Construct the greatest canonical decimal number below a very large limit using only a reusable set of allowed digits. It calls for string-based numeric reasoning, strict comparison, leading-zero rules, blocked-prefix recovery, impossible cases, and scalable performance.

Build the Largest Allowed Number Below a Limit

Company: ByteDance

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: hard

Interview Round: Technical Screen

Overview: Construct the greatest canonical decimal number below a very large limit using only a reusable set of allowed digits. It calls for string-based numeric reasoning, strict comparison, leading-zero rules, blocked-prefix recovery, impossible cases, and scalable performance.

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