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Giải trí sau giờ cơm cùng Xàm mơ - Lại một bài LeetCode nâng cao độ chịu đòn

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1961. Check If String Is a Prefix of Array

Easy

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Hint
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.length <= 20
    [*]1 <= s.length <= 1000
    [*]words and s consist of only lowercase English letters.

 
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