mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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181 lines
20 KiB
JSON
181 lines
20 KiB
JSON
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"title": "Minimum Cost for Cutting Cake II",
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"content": "<p>There is an <code>m x n</code> cake that needs to be cut into <code>1 x 1</code> pieces.</p>\n\n<p>You are given integers <code>m</code>, <code>n</code>, and two arrays:</p>\n\n<ul>\n\t<li><code>horizontalCut</code> of size <code>m - 1</code>, where <code>horizontalCut[i]</code> represents the cost to cut along the horizontal line <code>i</code>.</li>\n\t<li><code>verticalCut</code> of size <code>n - 1</code>, where <code>verticalCut[j]</code> represents the cost to cut along the vertical line <code>j</code>.</li>\n</ul>\n\n<p>In one operation, you can choose any piece of cake that is not yet a <code>1 x 1</code> square and perform one of the following cuts:</p>\n\n<ol>\n\t<li>Cut along a horizontal line <code>i</code> at a cost of <code>horizontalCut[i]</code>.</li>\n\t<li>Cut along a vertical line <code>j</code> at a cost of <code>verticalCut[j]</code>.</li>\n</ol>\n\n<p>After the cut, the piece of cake is divided into two distinct pieces.</p>\n\n<p>The cost of a cut depends only on the initial cost of the line and does not change.</p>\n\n<p>Return the <strong>minimum</strong> total cost to cut the entire cake into <code>1 x 1</code> pieces.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">m = 3, n = 2, horizontalCut = [1,3], verticalCut = [5]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">13</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/04/ezgifcom-animated-gif-maker-1.gif\" style=\"width: 280px; height: 320px;\" /></p>\n\n<ul>\n\t<li>Perform a cut on the vertical line 0 with cost 5, current total cost is 5.</li>\n\t<li>Perform a cut on the horizontal line 0 on <code>3 x 1</code> subgrid with cost 1.</li>\n\t<li>Perform a cut on the horizontal line 0 on <code>3 x 1</code> subgrid with cost 1.</li>\n\t<li>Perform a cut on the horizontal line 1 on <code>2 x 1</code> subgrid with cost 3.</li>\n\t<li>Perform a cut on the horizontal line 1 on <code>2 x 1</code> subgrid with cost 3.</li>\n</ul>\n\n<p>The total cost is <code>5 + 1 + 1 + 3 + 3 = 13</code>.</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">m = 2, n = 2, horizontalCut = [7], verticalCut = [4]</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">15</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<ul>\n\t<li>Perform a cut on the horizontal line 0 with cost 7.</li>\n\t<li>Perform a cut on the vertical line 0 on <code>1 x 2</code> subgrid with cost 4.</li>\n\t<li>Perform a cut on the vertical line 0 on <code>1 x 2</code> subgrid with cost 4.</li>\n</ul>\n\n<p>The total cost is <code>7 + 4 + 4 = 15</code>.</p>\n</div>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= m, n <= 10<sup>5</sup></code></li>\n\t<li><code>horizontalCut.length == m - 1</code></li>\n\t<li><code>verticalCut.length == n - 1</code></li>\n\t<li><code>1 <= horizontalCut[i], verticalCut[i] <= 10<sup>3</sup></code></li>\n</ul>\n",
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"code": "# @param {Integer} m\n# @param {Integer} n\n# @param {Integer[]} horizontal_cut\n# @param {Integer[]} vertical_cut\n# @return {Integer}\ndef minimum_cost(m, n, horizontal_cut, vertical_cut)\n \nend",
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"The intended solution uses a Greedy approach.",
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"At each step, we will perform a cut on the line with the highest cost.",
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"If you perform a horizontal cut, can you count the contribution that it adds to each row cut that comes afterward?"
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