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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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