Write a program that prints how many different numbers there are
in a sequence with *n* integer numbers.

**Input**

Input contains different test data. Each test data starts with
a natural number *n*≥1 followed by a sequence with *n* integer numbers.

**Output**

For each sequence of the input print, in a line, the number of different elements that contains.

Public test cases

**Input**

5 15 12 41 15 41 5 99 99 99 99 99 1 -666 10 1 1 2 3 4 5 6 7 8 9

**Output**

3 1 1 9

Information

- Author
- Jordi Petit
- Language
- English
- Translator
- Carlos Molina
- Original language
- Catalan
- Other languages
- Catalan
- Official solutions
- C++
- User solutions
- C++