How to Solve Find All K- Distant Indices in an Array Problem
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Find All K-Distant Indices in an Array
You are given a 0-indexed integer array nums and two integers key and k. A k-distant index is an index i of nums for which there exists at least one index j such that |i - j| <= k and nums[j] == key. ...
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Understanding the Find All K- Distant Indices in an Array Problem
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Problem Statement
You are given a 0-indexed integer array nums and two integers key and k. A k-distant index is an index i of nums for which there exists at least one index j such that |i - j| <= k and nums[j] == key. Return a list of all k-distant indices sorted in increasing order.
Find All K-Distant Indices in an Array
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Examples
nums = [3,4,9,1,3,9,5], key = 9, k = 1[1,2,3,4,5,6]Here, nums[2] == key and nums[5] == key. - For index 0, |0 - 2| > k and |0 - 5| > k, so there is no j where |0 - j| <= k and nums[j] == key. Thus, 0 is not a k-distant index. - For index 1, |1 - 2| <= k and nums[2] == key, so 1 is a k-distant index. - For index 2, |2 - 2| <= k and nums[2] == key, so 2 is a k-distant index. - For index 3, |3 - 2| <= k and nums[2] == key, so 3 is a k-distant index. - For index 4, |4 - 5| <= k and nums[5] == key, so 4 is a k-distant index. - For index 5, |5 - 5| <= k and nums[5] == key, so 5 is a k-distant index. - For index 6, |6 - 5| <= k and nums[5] == key, so 6 is a k-distant index. Thus, we return [1,2,3,4,5,6] which is sorted in increasing order.
nums = [2,2,2,2,2], key = 2, k = 2[0,1,2,3,4]For all indices i in nums, there exists some index j such that |i - j| <= k and nums[j] == key, so every index is a k-distant index. Hence, we return [0,1,2,3,4].
Constraints
1 <= nums.length <= 10001 <= nums[i] <= 1000key is an integer from the array nums.1 <= k <= nums.lengthHow Interview Coder Helps with Leetcode Problems
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