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"translatedContent": "<p>给你一幅由 <code>N × N</code> 矩阵表示的图像,其中每个像素的大小为 4 字节。请你设计一种算法,将图像旋转 90 度。</p>\n\n<p>不占用额外内存空间能否做到?</p>\n\n<p> </p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n给定 <strong>matrix</strong> = \n[\n [1,2,3],\n [4,5,6],\n [7,8,9]\n],\n\n<strong>原地</strong>旋转输入矩阵,使其变为:\n[\n [7,4,1],\n [8,5,2],\n [9,6,3]\n]\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n给定 <strong>matrix</strong> =\n[\n [ 5, 1, 9,11],\n [ 2, 4, 8,10],\n [13, 3, 6, 7],\n [15,14,12,16]\n], \n\n<strong>原地</strong>旋转输入矩阵,使其变为:\n[\n [15,13, 2, 5],\n [14, 3, 4, 1],\n [12, 6, 8, 9],\n [16, 7,10,11]\n]\n</pre>\n\n<p><strong>注意</strong>:本题与主站 48 题相同:<a href=\"https://leetcode-cn.com/problems/rotate-image/\">https://leetcode-cn.com/problems/rotate-image/</a></p>\n",
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"difficulty": "Medium",
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"hints": [
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"尝试逐层思考。你能旋转某个特定图层吗?",
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"旋转一个特定的层只意味着在4个数组中交换值。如果要求你在2个数组中交换值,你能做到吗?你能把它扩展到4个数组吗?"
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