count_number_of_teams.cpp

class Solution {
public:
    int numTeams(vector<int>& rating) {
        int count = 0;
        // Iterate all ascending index sets
        for (int i = 0; i < rating.size()-2; i++) {
            for (int j = i+1; j < rating.size()-1; j++) {
                for (int k = j+1; k < rating.size(); k++) {
                    if (rating[i] > rating[j] & rating[j] > rating[k])
                        count++;
                    if (rating[i] < rating[j] & rating[j] < rating[k])
                        count++;
                }
            }
        }
        return count;
    }
};