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Check for three consecutive numbers
Basic Accuracy: 43.49% Submissions: 46 Points: 1

Given an integer n, the task is to find whether n can be written as sum of three consecutive integer.

Example 1:

Input: n = 6
Output: 1 2 3 
Explanation: 6 = 1+2+3
Hence 6 can be written as sum of 
three consecutive integer.

Example 2:

Input: n = 7
Output: -1
Explanation: 6 cannot be written as 
sum of three consecutive integer.


Your Task:  
You dont need to read input or print anything. Complete the function consecutiveSum() which takes n as input parameter and returns a vector contains of three consecutive integers if it is possible else -1.

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

Constraints:
1<= n <=10000

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Check for three consecutive numbers

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