# 441. Arranging Coins (Leetcode || Java || Easy)

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.

**Constraints:**

`1 <= n <= 231 - 1`

# SOLUTION:

class Solution {

public int arrangeCoins(int n) {

int count = 0;//counting number of steps n will cover

int i = 1;

while(n > 0){

n = n — i;//eliminating steps

i++;

count++;

if(n == 0){//if n becomes 0 it means the last step is also filled

return count;

}

}

return count — 1;//n do no become zero in the last hence, we do not consider the last step

}

}

Thank you for reading. If you have any queries, please let me know int the comment section.