LeetCode-in-Java

1662. Check If Two String Arrays are Equivalent

Easy

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

public class Solution {
    public boolean arrayStringsAreEqual(String[] word1, String[] word2) {
        StringBuilder sb1 = new StringBuilder();
        for (String word : word1) {
            sb1.append(word);
        }
        StringBuilder sb2 = new StringBuilder();
        for (String word : word2) {
            sb2.append(word);
        }
        return sb1.toString().equals(sb2.toString());
    }
}

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