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)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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