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Given a positive integer n, how many ways can we write it as a sum of consecutive positive integers?

Example 1:

Input: n = 5
Output: 2
Explanation: 5 = 5 = 2 + 3

Example 2:

Input: n = 9
Output: 3
Explanation: 9 = 9 = 4 + 5 = 2 + 3 + 4

Example 3:

Input: n = 15
Output: 4
Explanation: 15 = 15 = 8 + 7 = 4 + 5 + 6 = 1 + 2 + 3 + 4 + 5

Note: 1 <= n <= 10 ^ 9.

class Solution: def consecutiveNumbersSum(self, n: int) -> int: