[Java] LeetCode 441 : Arranging Coins LeetCode # 441 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. Note: 1 LeetCode/Easy 2021.05.14
