JOIN

 Problem Statement

Problem Statement for InterestingNumber

### Problem Statement

Fox Ciel thinks that the number 41312432 is interesting. This is because of the following property: There is exactly 1 digit between the two 1s, there are exactly 2 digits between the two 2s, and so on.

Formally, Ciel thinks that a number X is interesting if the following property is satisfied: For each D between 0 and 9, inclusive, X either does not contain the digit D at all, or it contains exactly two digits D, and there are precisely D other digits between them.

You are given a String x that contains the digits of a positive integer. Return "Interesting" if that integer is interesting, otherwise return "Not interesting".

### Definition

 Class: InterestingNumber Method: isInteresting Parameters: String Returns: String Method signature: String isInteresting(String x) (be sure your method is public)

### Constraints

-x will correspond to an integer between 1 and 1,000,000,000, inclusive.

### Examples

0)

 `"2002"`
`Returns: "Interesting"`
 There are 0 digits between the two 0s, and 2 digits between the two 2s, so this is an interesting number.
1)

 `"1001"`
`Returns: "Not interesting"`
 There should be 1 digit between the two 1s, but there are 2 digits between them. Hence, this number is not interesting.
2)

 `"41312432"`
`Returns: "Interesting"`
 This is the number in the statement.
3)

 `"611"`
`Returns: "Not interesting"`
 There is only one digit 6 in this number, so it's not interesting.
4)

 `"64200246"`
`Returns: "Interesting"`
5)

 `"631413164"`
`Returns: "Not interesting"`
 This number contains the digit 1 three times.

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This problem was used for:
Single Round Match 611 Round 1 - Division II, Level One