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    "# Array Interview Questions"
   ]
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   "source": [
    "### Problem 1:\n",
    "Given a N*N matrix, rotate the matrix by 90 degrees clockwise\n",
    "- Input: [[1, 2, 3],\n",
    "          [4, 5, 6],\n",
    "          [7, 8, 9]]\n",
    "          \n",
    "- Output: [[7, 4, 1]\n",
    "           [8, 5, 2] \n",
    "           [9, 6, 3]]"
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