Check If Two String Arrays are Equivalent

Given two string arrays word1 and word2, return true if the two arrays represent the same string, and false otherwise.

A string is represented by an array if the array elements concatenated in order forms the string.

Example 1:

Input: word1 = ["ab", "c"], word2 = ["a", "bc"]
Output: true
Explanation:
word1 represents string "ab" + "c" -> "abc"
word2 represents string "a" + "bc" -> "abc"
The strings are the same, so return true.

Example 2:

Input: word1 = ["a", "cb"], word2 = ["ab", "c"]
Output: false

Example 3:

Input: word1  = ["abc", "d", "defg"], word2 = ["abcddefg"]
Output: true

 

Constraints:

• 1 <= word1.length, word2.length <= 103
• 1 <= word1[i].length, word2[i].length <= 103
• 1 <= sum(word1[i].length), sum(word2[i].length) <= 103
• word1[i] and word2[i] consist of lowercase letters.

Solution:

class Solution {

    public boolean arrayStringsAreEqual(String[] word1, String[] word2) {

        String str1 = "", str2="";

        for(String word:word1)

            str1+=word;

        for(String word:word2)

            str2+=word;

        return str1.equals(str2);

    }

}

Try it on Leetcode

Here, the above solution is one of the most easiest approach for this problem.

1) Create two temporary strings str1, str2.

2) Form a string str1 by traversing the entire word1 string array.

3) Form a string str2 by traversing the entire word2 string array.

4) Finally check equality for both of the strings and return it.

Related Posts:

List of all Leetcode Problems with Solutions and Explanation 

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