How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

What difficulty level is this interview question?

This is a Medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Snapchat.

What role is this question designed for?

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

Solve Open the Lock BFS

Last updated: Mar 29, 2026

Quick Overview

This question evaluates the ability to model the lock as a state-space and apply graph traversal and shortest-path techniques (breadth-first search) to determine minimal move sequences under constraints.

Medium
Snapchat
Coding & Algorithms
Software Engineer

Snapchat

Aug 4, 2025, 10:55 AM

Software Engineer

Technical Screen

Coding & Algorithms

Question

LeetCode 752. Open the Lock – Given an initial lock state "0000", a target combination, and a list of deadend combinations that cannot be used, each move rotates one digit ±1 (with wrap-around), find the minimum number of moves to reach the target.

https://leetcode.com/problems/open-the-lock/description/

Comments (0)

Loading comments...

Browse More Questions

More Coding & Algorithms•More Snapchat•More Software Engineer•Snapchat Software Engineer•Snapchat Coding & Algorithms•Software Engineer Coding & Algorithms