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How to Solve Check If a Word Occurs As a Prefix of Any Word in a Sentence Problem

Master the Check If a Word Occurs As a Prefix of Any Word in a Sentence LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.

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Easy#1455

LeetCode Problem

Check If a Word Occurs As a Prefix of Any Word in a Sentence

Given a sentence that consists of some words separated by a single space, and a searchWord, check if searchWord is a prefix of any word in sentence. Return the index of the word in sentence (1-indexed) where searchWord is a prefix of this word. If searchWord is a prefix of more than one word, return the index of the first word (minimum index). If there is no such word return -1. A prefix of a string s is any leading contiguous substring of s.

Two PointersStringString Matching

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Problem Breakdown

Understanding the Check If a Word Occurs As a Prefix of Any Word in a Sentence Problem

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

Problem Statement

EasyProblem #1455

LeetCode

Check If a Word Occurs As a Prefix of Any Word in a Sentence

How Phantom Code Helps

Get real-time assistance for Check If a Word Occurs As a Prefix of Any Word in a Sentence problems during coding interviews. Phantom Code provides instant solutions and explanations.

Examples

# Example 1

Input

sentence = "i love eating burger", searchWord = "burg"

Output

# Example 2

Input

sentence = "this problem is an easy problem", searchWord = "pro"

Output

# Example 3

Input

sentence = "i am tired", searchWord = "you"

Output

-1

Constraints

1 <= sentence.length <= 100

1 <= searchWord.length <= 10

sentence consists of lowercase English letters and spaces.

searchWord consists of lowercase English letters.

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Solve Check If a Word Occurs As a Prefix of Any Word in a Sentence — Given a sentence that consists of some words separated by a single space, and a ...

Here's the optimal approach using Two Pointers:

def solve(input):

# Optimal O(n) solution

return result

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

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We work with Zoom, HackerRank, CodeSignal, CoderPad and other web-based platforms. Check the compatibility note and request a browser link if a specific desktop app is unsupported.

Frequently Asked Questions

Common questions about solving Check If a Word Occurs As a Prefix of Any Word in a Sentence and using Phantom Code during coding interviews.

How does Phantom Code help me solve coding problems like Check If a Word Occurs As a Prefix of Any Word in a Sentence 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 Check If a Word Occurs As a Prefix of Any Word in a Sentence?

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 Check If a Word Occurs As a Prefix of Any Word in a Sentence?

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 Check If a Word Occurs As a Prefix of Any Word in a Sentence 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 Check If a Word Occurs As a Prefix of Any Word in a Sentence 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 Check If a Word Occurs As a Prefix of Any Word in a Sentence 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 Check If a Word Occurs As a Prefix of Any Word in a Sentence 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 Check If a Word Occurs As a Prefix of Any Word in a Sentence 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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