MegaCoolNumbersEasy | Topcoder Archive

Problem Statement

A positive integer is called a mega cool number if its digits form an arithmetic progression. An arithmetic progression is a sequence of numbers in which the difference between any two consecutive numbers is the same. Return the number of mega cool numbers between 1 and N, inclusive.

Definition

Class:: MegaCoolNumbersEasy
Method:: count
Parameters:: int
Returns:: int
Method signature:: int count(int N)
(be sure your method is public)

Constraints

N will be between 1 and 1,000, inclusive.

Examples

```
1
```
```
Returns: 1
```
The only mega cool number not greater than 1 is 1.
```
110
```
```
Returns: 99
```
All numbers between 1 and 99 are mega cool.
```
500
```
```
Returns: 119
```

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