K-diff Pairs in an Array (Python 3)

  • 0
    class Solution:
        def findPairs(self, nums, k):
            if k<0:return 0
            if k==0:return len(set(list(filter(lambda x:nums.count(x)>1,nums))))
            return len(set(sorted(nums)) & set(map(lambda x:x+k,nums)))
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