# Disarium number

Disarium number can be defined as a number whose sum of digits, powered with their respective position, is equal to the original number.

Write a program to determine given number is disarium number.

For example

```
Input:
135
Output
Disarium number
1*1 + 3*2 + 5*3 = 135
```

#### Solution:

```
using System;
namespace DisarumNUmber
{
class Program
{
static void Main()
{
Console.WriteLine("Enter a number:");
var num = Convert.ToInt32(Console.ReadLine());
var length = 0;
int on;
var n = on = num;
while (n != 0)
{
length += 1;
n /= 10;
}
var sum = 0;
while (num > 0)
{
var rem = num % 10;
sum = sum + (int)Math.Pow(rem, length);
num = num / 10;
length--;
}
Console.WriteLine(sum == on ? "Disarium number" : "Not a disarium number");
Console.ReadLine();
}
}
}
```