1961. Check If String Is a Prefix of Array

https://leetcode.com/problems/check-if-string-is-a-prefix-of-array

Description

Given a string s and an array of strings words, determine whether s is a prefix string of words.

A string s is a prefix string of words if s can be made by concatenating the first k strings in words for some positive k no larger than words.length.

Return true if s is a prefix string of words, or false otherwise.

Example 1:

**Input:** s = "iloveleetcode", words = ["i","love","leetcode","apples"]
**Output:** true
**Explanation:**
s can be made by concatenating "i", "love", and "leetcode" together.

Example 2:

**Input:** s = "iloveleetcode", words = ["apples","i","love","leetcode"]
**Output:** false
**Explanation:**
It is impossible to make s using a prefix of arr.

Constraints:

• 1 <= words.length <= 100

• 1 <= words[i].length <= 20

• 1 <= s.length <= 1000

• words[i] and s consist of only lowercase English letters.

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