Count Prefixes of a Given String
You are given a string array words and a string s, where words[i] and s comprise only of lowercase English letters.
Return the number of strings in words that are a prefix of s.
A prefix of a string is a substring that occurs at the beginning of the string. A substring is a contiguous sequence of characters within a string.
Example 1
Input
words = ["a","b","c","ab","bc","abc"], s = "abc"Output
3The strings in words which are a prefix of s = "abc" are "a", "ab", and "abc", so the count is 3.
Example 2
Input
words = ["a","a"], s = "aa"Output
2Both strings are a prefix of s, and the same string can occur multiple times in words and should be counted each time.
Constraints
- 1 <= words.length <= 1000
- 1 <= words[i].length, s.length <= 10
- words[i] and s consist of lowercase English letters only.