Package g1901_2000.s1961_check_if_string_is_a_prefix_of_array

Class Solution

  • public class Solution
extends Object
    1961 - Check If String Is a Prefix of Array.

    Easy

    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.

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • isPrefixString

        public boolean isPrefixString​(String s,
                              String[] words)