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/**
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 * @param {number[][]} matrix
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 * @return {void} Do not return anything, modify matrix in-place instead.
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 */
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var rotate = function (matrix) {
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  let m = matrix.length;
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  let n = matrix[0].length;
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  for (let i = m - 1; i >= 0; i--) {
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    for (let j = 0; j < m; j++) {
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      matrix[j].push(matrix[i].shift());
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    }
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  }
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};