1395. Count Number of Teams

There are n soldiers standing in a line. Each soldier is assigned a unique rating value. You have to form a team of 3 soldiers amongst them under the following rules: - Choose 3 soldiers with index (i, j, k) with rating (rating[i], rating[j], rating[k]). - A team is valid if: (rating[i] < rating[j] < rating[k]) or (rating[i] > rating[j] > rating[k]) where (0 <= i < j < k < n). Return the numbe