Arranging Coins

{5} Arranging Coins
You have n coins and you want to build a staircase with these coins. The staircase consists of k rows where the ith row has exactly i coins. The last row of the staircase may be incomplete.
Given the integer n, return the number of complete rows of the staircase you will build.
Example 1:
Input: n = 5
Output: 2
Explanation: Because the 3rd row is incomplete, we return 2.
Example 2:
Input: n = 8
Output: 3
Explanation: Because the 4th row is incomplete, we return 3.

class Solution {
    public int arrangeCoins(int n) {
        int ans = 1;
    while(n > 0){
      ans++;
      n = n-ans;
    }
    return ans-1;
    }
}