int numTeams(vector<int>& rating) {
        int n = rating.size();
        int ans=0;
        for (int i=0; i<n; i++) {
            for (int j=i+1; j<n; j++) {
                for (int k=j+1; k<n; k++) {
                    if ((rating[i] < rating[j] && rating[j] < rating[k]) ||
                        (rating[i] > rating[j] && rating[j] > rating[k])) {
                        ans++;
                    }
                }
            }
        }

        return ans;
    }