Question

Given an array of integers A, and an integer K find number of happy elements. Element X is happy if there exists at least 1 element whose difference is less than K i.e. an element X is happy, if there is another element in the range [X-K, X+K] other than X itself. Constraints 1 <= N <= 10^5 0 <= K <= 10^5 0 <= A[i] <= 10^9​

Answer 1

Answer:

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