mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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180 lines
16 KiB
JSON
180 lines
16 KiB
JSON
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"title": "How Many Numbers Are Smaller Than the Current Number",
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"content": "<p>Given the array <code>nums</code>, for each <code>nums[i]</code> find out how many numbers in the array are smaller than it. That is, for each <code>nums[i]</code> you have to count the number of valid <code>j's</code> such that <code>j != i</code> <strong>and</strong> <code>nums[j] < nums[i]</code>.</p>\n\n<p>Return the answer in an array.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [8,1,2,2,3]\n<strong>Output:</strong> [4,0,1,1,3]\n<strong>Explanation:</strong> \nFor nums[0]=8 there exist four smaller numbers than it (1, 2, 2 and 3). \nFor nums[1]=1 does not exist any smaller number than it.\nFor nums[2]=2 there exist one smaller number than it (1). \nFor nums[3]=2 there exist one smaller number than it (1). \nFor nums[4]=3 there exist three smaller numbers than it (1, 2 and 2).\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [6,5,4,8]\n<strong>Output:</strong> [2,1,0,3]\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [7,7,7,7]\n<strong>Output:</strong> [0,0,0,0]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 <= nums.length <= 500</code></li>\n\t<li><code>0 <= nums[i] <= 100</code></li>\n</ul>\n",
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"exampleTestcases": "[8,1,2,2,3]\n[6,5,4,8]\n[7,7,7,7]",
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"code": "(define/contract (smaller-numbers-than-current nums)\n (-> (listof exact-integer?) (listof exact-integer?))\n\n )",
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"code": "-spec smaller_numbers_than_current(Nums :: [integer()]) -> [integer()].\nsmaller_numbers_than_current(Nums) ->\n .",
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"code": "defmodule Solution do\n @spec smaller_numbers_than_current(nums :: [integer]) :: [integer]\n def smaller_numbers_than_current(nums) do\n\n end\nend",
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"Brute force for each array element.",
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"In order to improve the time complexity, we can sort the array and get the answer for each array element."
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],
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"sampleTestCase": "[8,1,2,2,3]",
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