1534. Count Good Triplets
https://leetcode.com/problems/count-good-triplets
Description
Given an array of integers arr
, and three integers a
, b
and c
. You need to find the number of good triplets.
A triplet (arr[i], arr[j], arr[k])
is good if the following conditions are true:
0 <= i < j < k < arr.length
|arr[i] - arr[j]| <= a
|arr[j] - arr[k]| <= b
|arr[i] - arr[k]| <= c
Where |x|
denotes the absolute value of x
.
Return the number of good triplets.
Example 1:
**Input:** arr = [3,0,1,1,9,7], a = 7, b = 2, c = 3
**Output:** 4
**Explanation:** There are 4 good triplets: [(3,0,1), (3,0,1), (3,1,1), (0,1,1)].
Example 2:
**Input:** arr = [1,1,2,2,3], a = 0, b = 0, c = 1
**Output:** 0
**Explanation:** No triplet satisfies all conditions.
Constraints:
3 <= arr.length <= 100
0 <= arr[i] <= 1000
0 <= a, b, c <= 1000
ac
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