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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"title": "Ways to Split Array Into Good Subarrays",
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"content": "<p>You are given a binary array <code>nums</code>.</p>\n\n<p>A subarray of an array is <strong>good</strong> if it contains <strong>exactly</strong> <strong>one</strong> element with the value <code>1</code>.</p>\n\n<p>Return <em>an integer denoting the number of ways to split the array </em><code>nums</code><em> into <strong>good</strong> subarrays</em>. As the number may be too large, return it <strong>modulo</strong> <code>10<sup>9</sup> + 7</code>.</p>\n\n<p>A subarray is a contiguous <strong>non-empty</strong> sequence of elements within an array.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [0,1,0,0,1]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> There are 3 ways to split nums into good subarrays:\n- [0,1] [0,0,1]\n- [0,1,0] [0,1]\n- [0,1,0,0] [1]\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [0,1,0]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> There is 1 way to split nums into good subarrays:\n- [0,1,0]\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>0 <= nums[i] <= 1</code></li>\n</ul>\n",
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"code": "impl Solution {\n pub fn number_of_good_subarray_splits(nums: Vec<i32>) -> i32 {\n \n }\n}",
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"code": "-spec number_of_good_subarray_splits(Nums :: [integer()]) -> integer().\nnumber_of_good_subarray_splits(Nums) ->\n .",
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"hints": [
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"If the array consists of only 0s answer is 0.",
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"In the final split, exactly one separation point exists between two consecutive 1s.",
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"In how many ways can separation points be put?"
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],
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"sampleTestCase": "[0,1,0,0,1]",
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