1534-count-good-triplets.cpp

class Solution {
public:
    int countGoodTriplets(vector<int>& arr, int a, int b, int c) {
        int n = arr.size() ; 
        int count = 0 ; 
        for (int i = 0; i < n - 2 ; i ++)
            for (int j = i + 1 ;j < n - 1 ; j++)
                if (abs(arr[i] - arr[j]) <= a)
                    for (int k = j + 1 ; k < n ; k++)
                        if (abs(arr[j] - arr[k]) <= b && abs(arr[i] - arr[k]) <= c)
                             count ++;
        return count ;
    }
};