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            "title": "Largest 1-Bordered Square",
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            "content": "<p>Given a 2D <code>grid</code> of <code>0</code>s and <code>1</code>s, return the number of elements in&nbsp;the largest <strong>square</strong>&nbsp;subgrid that has all <code>1</code>s on its <strong>border</strong>, or <code>0</code> if such a subgrid&nbsp;doesn&#39;t exist in the <code>grid</code>.</p>\r\n\r\n<p>&nbsp;</p>\r\n<p><strong class=\"example\">Example 1:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> grid = [[1,1,1],[1,0,1],[1,1,1]]\r\n<strong>Output:</strong> 9\r\n</pre>\r\n\r\n<p><strong class=\"example\">Example 2:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> grid = [[1,1,0,0]]\r\n<strong>Output:</strong> 1\r\n</pre>\r\n\r\n<p>&nbsp;</p>\r\n<p><strong>Constraints:</strong></p>\r\n\r\n<ul>\r\n\t<li><code>1 &lt;= grid.length &lt;= 100</code></li>\r\n\t<li><code>1 &lt;= grid[0].length &lt;= 100</code></li>\r\n\t<li><code>grid[i][j]</code> is <code>0</code> or <code>1</code></li>\r\n</ul>",
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                    "code": "class Solution {\npublic:\n    int largest1BorderedSquare(vector<vector<int>>& grid) {\n        \n    }\n};",
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                    "code": "class Solution {\n    public int largest1BorderedSquare(int[][] grid) {\n        \n    }\n}",
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                    "code": "class Solution(object):\n    def largest1BorderedSquare(self, grid):\n        \"\"\"\n        :type grid: List[List[int]]\n        :rtype: int\n        \"\"\"\n        ",
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                    "code": "class Solution:\n    def largest1BorderedSquare(self, grid: List[List[int]]) -> int:\n        ",
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                    "lang": "C",
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                    "code": "\n\nint largest1BorderedSquare(int** grid, int gridSize, int* gridColSize){\n\n}",
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                    "code": "public class Solution {\n    public int Largest1BorderedSquare(int[][] grid) {\n        \n    }\n}",
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                    "code": "/**\n * @param {number[][]} grid\n * @return {number}\n */\nvar largest1BorderedSquare = function(grid) {\n    \n};",
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                    "code": "function largest1BorderedSquare(grid: number[][]): number {\n\n};",
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                    "code": "class Solution {\n\n    /**\n     * @param Integer[][] $grid\n     * @return Integer\n     */\n    function largest1BorderedSquare($grid) {\n        \n    }\n}",
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                    "code": "class Solution {\n    func largest1BorderedSquare(_ grid: [[Int]]) -> Int {\n        \n    }\n}",
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                    "code": "func largest1BorderedSquare(grid [][]int) int {\n    \n}",
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                    "lang": "Ruby",
                    "langSlug": "ruby",
                    "code": "# @param {Integer[][]} grid\n# @return {Integer}\ndef largest1_bordered_square(grid)\n    \nend",
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                    "lang": "Scala",
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                    "code": "object Solution {\n    def largest1BorderedSquare(grid: Array[Array[Int]]): Int = {\n        \n    }\n}",
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                    "lang": "Rust",
                    "langSlug": "rust",
                    "code": "impl Solution {\n    pub fn largest1_bordered_square(grid: Vec<Vec<i32>>) -> i32 {\n        \n    }\n}",
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            "hints": [
                "For each square, know how many ones are up, left, down, and right of this square. You can find it in O(N^2) using dynamic programming.",
                "Now for each square ( O(N^3) ), we can evaluate whether that square is 1-bordered in O(1)."
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