4-line Python, easy to understand

  • 0

    Just apply the problem statement directly - check if each row i is the same as each column j for j = i.

    def validWordSquare(self, words):
        return all(row == self.col(words, i) for i, row in enumerate(words))
    def col(self, words, j):
        return ''.join(word[j] for word in words if j < len(word))

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