mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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181 lines
16 KiB
JSON
181 lines
16 KiB
JSON
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"questionId": "1805",
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"title": "Minimum Adjacent Swaps for K Consecutive Ones",
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"content": "<p>You are given an integer array, <code>nums</code>, and an integer <code>k</code>. <code>nums</code> comprises of only <code>0</code>'s and <code>1</code>'s. In one move, you can choose two <strong>adjacent</strong> indices and swap their values.</p>\n\n<p>Return <em>the <strong>minimum</strong> number of moves required so that </em><code>nums</code><em> has </em><code>k</code><em> <strong>consecutive</strong> </em><code>1</code><em>'s</em>.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,0,0,1,0,1], k = 2\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> In 1 move, nums could be [1,0,0,0,<u>1</u>,<u>1</u>] and have 2 consecutive 1's.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,0,0,0,0,0,1,1], k = 3\n<strong>Output:</strong> 5\n<strong>Explanation:</strong> In 5 moves, the leftmost 1 can be shifted right until nums = [0,0,0,0,0,<u>1</u>,<u>1</u>,<u>1</u>].\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [1,1,0,1], k = 2\n<strong>Output:</strong> 0\n<strong>Explanation:</strong> nums already has 2 consecutive 1's.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 10<sup>5</sup></code></li>\n\t<li><code>nums[i]</code> is <code>0</code> or <code>1</code>.</li>\n\t<li><code>1 <= k <= sum(nums)</code></li>\n</ul>\n",
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"exampleTestcases": "[1,0,0,1,0,1]\n2\n[1,0,0,0,0,0,1,1]\n3\n[1,1,0,1]\n2",
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"categoryTitle": "Algorithms",
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"code": "(define/contract (min-moves nums k)\n (-> (listof exact-integer?) exact-integer? exact-integer?)\n\n )",
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"hints": [
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"Choose k 1s and determine how many steps are required to move them into 1 group.",
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"Maintain a sliding window of k 1s, and maintain the steps required to group them.",
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"When you slide the window across, should you move the group to the right? Once you move the group to the right, it will never need to slide to the left again."
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