{ "data": { "question": { "questionId": "532", "questionFrontendId": "532", "boundTopicId": null, "title": "K-diff Pairs in an Array", "titleSlug": "k-diff-pairs-in-an-array", "content": "

Given an array of integers nums and an integer k, return the number of unique k-diff pairs in the array.

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A k-diff pair is an integer pair (nums[i], nums[j]), where the following are true:

\n\n\n\n

Notice that |val| denotes the absolute value of val.

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Example 1:

\n\n
\nInput: nums = [3,1,4,1,5], k = 2\nOutput: 2\nExplanation: There are two 2-diff pairs in the array, (1, 3) and (3, 5).\nAlthough we have two 1s in the input, we should only return the number of unique pairs.\n
\n\n

Example 2:

\n\n
\nInput: nums = [1,2,3,4,5], k = 1\nOutput: 4\nExplanation: There are four 1-diff pairs in the array, (1, 2), (2, 3), (3, 4) and (4, 5).\n
\n\n

Example 3:

\n\n
\nInput: nums = [1,3,1,5,4], k = 0\nOutput: 1\nExplanation: There is one 0-diff pair in the array, (1, 1).\n
\n\n

 

\n

Constraints:

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Compiled with clang 11 using the latest C++ 20 standard.

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Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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Most standard library headers are already included automatically for your convenience.

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OpenJDK 17. Java 8 features such as lambda expressions and stream API can be used.

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Most standard library headers are already included automatically for your convenience.

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Includes Pair class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.

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Python 2.7.12.

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C# 10 with .NET 6 runtime

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Go 1.21

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Python 3.10.

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