problem0829

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Published: Jul 25, 2019 License: MIT Imports: 1 Imported by: 0

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829. Consecutive Numbers Sum

题目

Given a positive integerN, how many ways can we write it as a sum ofconsecutive positive integers?

Example 1:

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

Example 2:

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

Example 3:

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

Note:1 <= N <= 10 ^ 9.

解题思路

https://leetcode.com/problems/consecutive-numbers-sum/discuss/129015/5-lines-C++-solution-with-detailed-mathematical-explanation

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