mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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179 lines
17 KiB
JSON
179 lines
17 KiB
JSON
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"questionId": "2916",
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"title": "Check if it is Possible to Split Array",
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"content": "<p>You are given an array <code>nums</code> of length <code>n</code> and an integer <code>m</code>. You need to determine if it is possible to split the array into <code>n</code> <strong>non-empty</strong> arrays by performing a series of steps.</p>\n\n<p>In each step, you can select an existing array (which may be the result of previous steps) with a length of <strong>at least two</strong> and split it into <strong>two </strong>subarrays, if, <strong>for each </strong>resulting subarray, <strong>at least</strong> one of the following holds:</p>\n\n<ul>\n\t<li>The length of the subarray is one, or</li>\n\t<li>The sum of elements of the subarray is <strong>greater than or equal</strong> to <code>m</code>.</li>\n</ul>\n\n<p>Return <code>true</code><em> if you can split the given array into </em><code>n</code><em> arrays, otherwise return</em> <code>false</code>.</p>\n\n<p><strong>Note:</strong> A subarray is <em>a contiguous non-empty sequence of elements within an array</em>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2, 2, 1], m = 4\n<strong>Output:</strong> true\n<strong>Explanation:</strong> We can split the array into [2, 2] and [1] in the first step. Then, in the second step, we can split [2, 2] into [2] and [2]. As a result, the answer is true.</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2, 1, 3], m = 5 \n<strong>Output:</strong> false\n<strong>Explanation: </strong>We can try splitting the array in two different ways: the first way is to have [2, 1] and [3], and the second way is to have [2] and [1, 3]. However, both of these ways are not valid. So, the answer is false.</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2, 3, 3, 2, 3], m = 6\n<strong>Output:</strong> true\n<strong>Explanation:</strong> We can split the array into [2, 3, 3, 2] and [3] in the first step. Then, in the second step, we can split [2, 3, 3, 2] into [2, 3, 3] and [2]. Then, in the third step, we can split [2, 3, 3] into [2] and [3, 3]. And in the last step we can split [3, 3] into [3] and [3]. As a result, the answer is true.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= n == nums.length <= 100</code></li>\n\t<li><code>1 <= nums[i] <= 100</code></li>\n\t<li><code>1 <= m <= 200</code></li>\n</ul>\n",
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"categoryTitle": "Algorithms",
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"It can be proven that if you can split more than one element as a subarray, then you can split exactly one element."
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