Arranging Coins

Easy

You have n coins and want to build a staircase where row i holds exactly i coins. The last row may be incomplete. Return the number of complete rows you can build.

Example 1

Input:  n = 5
Output: 2

Example 2

Input:  n = 8
Output: 3

Example 3

Input:  n = 1
Output: 1

Constraints

• 1 <= n <= 2^31 - 1