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How to Solve Design Add and Search Words Data Structure Problem

Master the Design Add and Search Words Data Structure LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.

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Medium#211

LeetCode Problem

Design Add and Search Words Data Structure

Design a data structure that supports adding new words and finding if a string matches any previously added string. Implement the WordDictionary class: Example:

StringDepth-First SearchDesignTrie

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Problem Breakdown

Understanding the Design Add and Search Words Data Structure Problem

Let's break down this LeetCode problem and understand what makes it challenging in interview settings.

Problem Statement

Design a data structure that supports adding new words and finding if a string matches any previously added string. Implement the WordDictionary class: Example:

MediumProblem #211

LeetCode

Design Add and Search Words Data Structure

How Phantom Code Helps

Get real-time assistance for Design Add and Search Words Data Structure problems during coding interviews. Phantom Code provides instant solutions and explanations.

Examples

# Example 1

Input

—

Output

—

Constraints

1 <= word.length <= 25

word in addWord consists of lowercase English letters.

word in search consist of '.' or lowercase English letters.

There will be at most 2 dots in word for search queries.

At most 104 calls will be made to addWord and search.

How Phantom Code Helps with LeetCode Problems

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Solve Design Add and Search Words Data Structure — Design a data structure that supports adding new words and finding if a string m...

Here's the optimal approach using String:

def solve(input):

# Optimal O(n) solution

return result

Time: O(n) | Space: O(n)

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Undetectability Checklist

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Frequently Asked Questions

Common questions about solving Design Add and Search Words Data Structure and using Phantom Code during coding interviews.

How does Phantom Code help me solve coding problems like Design Add and Search Words Data Structure during interviews?

Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.

What if the interviewer asks follow-up questions or modifications to problems like Design Add and Search Words Data Structure?

Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.

Can Phantom Code help me communicate my solution for problems like Design Add and Search Words Data Structure?

Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.

How does Phantom Code assist with different programming languages for Design Add and Search Words Data Structure type problems?

Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.

What coding mistakes does Phantom Code help me avoid during Design Add and Search Words Data Structure interviews?

Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.

Is Phantom Code detectable when solving problems like Design Add and Search Words Data Structure during live interviews?

No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.

How does Phantom Code help when I'm struggling with Design Add and Search Words Data Structure style questions under pressure?

The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.

Does Phantom Code work for the coding platforms used in Design Add and Search Words Data Structure interviews?

Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.

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