g1901_2000.s1961_check_if_string_is_a_prefix_of_array

Class Solution

java.lang.Object

g1901_2000.s1961_check_if_string_is_a_prefix_of_array.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 Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	isPrefixString(String s, String[] words)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

isPrefixString

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