Leetcode 422. Valid Word Square
Check whether a list of words forms a valid word square: for every pair of indices i, j ensure word[i][j] == word[j][i], treating any missing/out-of-range character as a mismatch.
Question Timeline
See when this question was last asked and where, including any notes left by other candidates.
All Regions
Hello Interview Premium
Your account is free and you can post anonymously if you choose.