# 1534. Count Good Triplets """ given an array of integers 'arr', and three integers 'a, b, c', yo need to find the number of good triplets. a triplet '(arr[i], arr[j], arr[k])' is good if the following conditions are met: '0 <= i < j < k < arr.len, |arr[i] - arr[j]| <= (a, b, c)' where '|x|' denotes the absolute value of 'x'. return the number of good triplets. """ class Solution(object): def countGoodTriplets(self, arr, a, b, c): """ :type arr: List[int] :type a: int :type b: int :type c: int :rtype: int """ cnt = 0 n = len(arr) for i in range(n - 2): for k in range(i + 2, n): if abs(arr[k] - arr[i]) > c: continue for j in range(i + 1, k): if abs(arr[i] - arr[j]) <= a and abs(arr[j] - arr[k]) <= b: cnt += 1 return cnt if __name__ == "__main__": obj = Solution() print(obj.countGoodTriplets(arr=[3, 0, 1, 1, 9, 7], a=7, b=2, c=3)) print(obj.countGoodTriplets(arr=[1, 1, 2, 2, 3], a=0, b=0, c=1))