# LeetCode 1662. Check If Two String Arrays are Equivalent

## Description

https://leetcode.com/problems/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.

## Explanation

Compare two strings if they are the same.

## Python Solution

``````class Solution:
def arrayStringsAreEqual(self, word1: List[str], word2: List[str]) -> bool:
str1 = ""
str2 = ""

for word in word1:
str1 += word

for word in word2:
str2 += word

return str1 == str2``````
• Time Complexity: O(N)
• Space Complexity: O(N)