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}![\"\"](\"https://assets.leetcode.com/uploads/2020/09/11/magic_valid.jpg\")
\nwhile this one is not:\n![\"\"](\"https://assets.leetcode.com/uploads/2020/09/11/magic_invalid.jpg\")
\nIn total, there is only one magic square inside the given grid.\n![\"\"](\"https://assets.leetcode.com/uploads/2020/09/11/magic_main.jpg\")
\n