Your question is Pairs With Sum K. Start with the requirements on the right.
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Luxoft Singapore services may process numeric event attributes where analysts need to identify combinations that reach a specified threshold. Given an integer array and target k, return every unique pair of values whose sum equals k.
Each array element can be used at most once for a pair. If duplicate values produce the same value pair, include that pair only once. Return the result as a list of two-element lists sorted lexicographically, first by the smaller value and then by the larger value. Return an empty list when no pair exists.
Implement find_pairs(nums, k).
nums, a list of integers, and k, an integer target sum.[a, b], where a <= b and a + b == k.nums.def find_pairs(nums, k):