# Challenge: Find the Largest Number

Given the number of digits and the sum of the digits, find the largest number that can be created.

## We'll cover the following

## Problem statement

A girl lost the **key** to her locker (Note: The key is only numeric). She remembers the number of digits `N`

and the sum `S`

of all the digits of her password. She also knows that her password is the largest number of `N`

digits that can be possible with the given sum `S`

.

Implement a function that helps her retrieve her key.

### Input

The inputs are the number of digits and the sum of those digits.

### Output

The output prints the largest number that can be created (or the key).

### Sample input

```
number_of_digits = 3, sum_of_digits = 20
```

### Sample output

```
992
```

Note:If no number is possible for a combination of`sum_of_digits`

and`number_of_digits`

, then simply print`None`

.

Level up your interview prep. Join Educative to access 70+ hands-on prep courses.