#2255
Count Prefixes of a Given String
newbie · 240 · lc easy +18 · verified · 74.2% accepted · 604 likes · top 85%
Description
You are given a string array words and a string s, all consisting of lowercase English letters.
Return the count of strings in words that are a prefix of s.
A prefix of a string is any leading substring starting at index 0.
Example 1:
Input: words = ["a","b","c","ab","bc","abc"], s = "abc"
Output: 3
Explanation:
The strings in words which are a prefix of s = "abc" are:
"a", "ab", and "abc".
Thus the number of strings in words which are a prefix of s is 3.
Example 2:
Input: words = ["a","a"], s = "aa"
Output: 2
Explanation:
Both of the strings are a prefix of s.
Note that the same string can occur multiple times in words, and it should be counted each time.
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