1662. Check If Two String Arrays are Equivalent #

class Solution {
    public boolean arrayStringsAreEqual(String[] word1, String[] word2) {
        int i = 0, p = 0;
        int j = 0, q = 0;
        while (i < word1.length && j < word2.length) {
            if (word1[i].charAt(p++) != word2[j].charAt(q++)) return false;
            if (p == word1[i].length()) { i++; p = 0; }
            if (q == word2[j].length()) { j++; q = 0; }
        }
        return i == word1.length && j == word2.length;
    }
}

class Solution {
    public boolean arrayStringsAreEqual(String[] word1, String[] word2) {
        String ans1 = null, ans2 = null;
        for (String word: word1) ans1 += word;
        for (String word: word2) ans2 += word;
        return ans1.equals(ans2);
    }
}