Count possible triangles Java

PROGRAM TO COUNT THE NUMBER OF POSSIBLE TRIANGLES



import java.util.*;
  
class GFG {
    static void CountTriangles(int[] A)
    {
        int n = A.length;
  
        Arrays.sort(A);
  
        int count = 0;
  
        for (int i = n - 1; i >= 1; i--) {
            int l = 0, r = i - 1;
            while (l < r) {
                if (A[l] + A[r] > A[i]) {
  
                    // If it is possible with a[l], a[r]
                    // and a[i] then it is also possible
                    // with a[l+1]..a[r-1], a[r] and a[i]
                    count += r - l;
  
                    // checking for more possible solutions
                    r--;
                }
                else // if not possible check for
                // higher values of arr[l]
                {
                    l++;
                }
            }
        }
        System.out.print("No of possible solutions: " + count);
    }
  
    // Driver Code
    public static void main(String[] args)
    {
        int[] A = { 4, 3, 5, 7, 6 };
  
        CountTriangles(A);
    }
}

OUTPUT
No of possible solutions: 9

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