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Form a Triangle
Basic Accuracy: 41.49% Submissions: 51 Points: 1

Given an array of integers, we need to find out all possible ways construct non-degenerate triangle using array values as its sides. If no such triangle can be formed then return 0.

 

Example 1:

Input : [5, 4, 3, 1, 2]
Output : 3
Explanation:
Sides of possible triangle are
(2 3 4), (3 4 5) and (2 4 5)

 

Example 2:

Input : [4, 1, 2]
Output : 0 
No triangle is possible from given
array values

Your Task:  
You don't need to read input or print anything. Your task is to complete the function noOfTriangles() which takes the vector v[] and its size N as inputs and returns the count of all possible triangles that can be formed using the values from the array.


Expected Time Complexity: O(N2)
Expected Auxiliary Space: O(1)

Constraints:

1 ≤ N ≤ 103
1 ≤ A[i] ≤ 104

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Form a Triangle

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