How to Solve Number of Arithmetic Triplets Problem
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Number of Arithmetic Triplets
You are given a 0-indexed, strictly increasing integer array nums and a positive integer diff. A triplet (i, j, k) is an arithmetic triplet if the following conditions are met: i < j < k, nums[j] - nu...
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Understanding the Number of Arithmetic Triplets Problem
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Problem Statement
You are given a 0-indexed, strictly increasing integer array nums and a positive integer diff. A triplet (i, j, k) is an arithmetic triplet if the following conditions are met: i < j < k, nums[j] - nums[i] == diff, and nums[k] - nums[j] == diff. Return the number of unique arithmetic triplets.
Number of Arithmetic Triplets
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Examples
nums = [0,1,4,6,7,10], diff = 32(1, 2, 4) is an arithmetic triplet because both 7 - 4 == 3 and 4 - 1 == 3. (2, 4, 5) is an arithmetic triplet because both 10 - 7 == 3 and 7 - 4 == 3.
nums = [4,5,6,7,8,9], diff = 22(0, 2, 4) is an arithmetic triplet because both 8 - 6 == 2 and 6 - 4 == 2. (1, 3, 5) is an arithmetic triplet because both 9 - 7 == 2 and 7 - 5 == 2.
Constraints
3 <= nums.length <= 2000 <= nums[i] <= 2001 <= diff <= 50nums is strictly increasing.How Interview Coder Helps with Leetcode Problems
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