Easy

Quiz

#1455 Check If a Word Occurs As a Prefix of Any Word in a Sentence

APPROACH

You are given a space-separated sentence and a searchWord. Scan the words of sentence from left to right using 1-based indexing and return the position of the first word that begins with searchWord as a prefix. If no such word exists, return -1.

A prefix of a string is any contiguous leading portion of it.

Example 1:

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

Output: 4

Explanation: "burg" is prefix of "burger" which is the 4th word in the sentence.

Example 2:

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

Output: 2

Explanation: "pro" is prefix of "problem" which is the 2nd and the 6th word in the sentence, but we return 2 as it's the minimal index.

Example 3:

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

Output: -1

Explanation: "you" is not a prefix of any word in the sentence.

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What is the optimal approach for this problem?