08. Check If Two String Arrays are Equivalent.cpp

/*
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.

Hint #1  
Concatenate all strings in the first array into a single string in the given order, the same for the second array.

Hint #2  
Both arrays represent the same string if and only if the generated strings are the same.
*/

class Solution
{
public:
  bool arrayStringsAreEqual(vector<string> &word1, vector<string> &word2)
  {
    string a, b;

    for (auto &i : word1)
      a += i;
    for (auto &i : word2)
      b += i;

    return a == b;
  }
};