You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins.

Given n, find the total number of full staircase rows that can be formed.

n is a non-negative integer and fits within the range of a 32-bit signed integer.

Example 1:

n = 5

The coins can form the following rows:

¤

¤ ¤

¤ ¤

Because the 3rd row is incomplete, we return 2.

Example 2:

n = 8

The coins can form the following rows:

¤

¤ ¤

¤ ¤ ¤

¤ ¤

Because the 4th row is incomplete, we return 3.

## Java Program:

```
import java.util.Scanner;
public class staircase {
public static void main(String[] args){
System.out.println("Enter no number");
int n =new Scanner(System.in).nextInt();
if (n>0)
System.out.println("The number of rows"+ ((int)Math.sqrt(8*(long)n+1)-1)/2);
}
}
```