Count Distinct Elements
Count how many different values an array holds using a set.
Input format
The first line has one integer N. The second line has N space-separated integers.
Output format
Print how many distinct values the array contains.
Constraints
- Values fit in a 64-bit signed integer
- Trailing whitespace and a trailing newline are ignored by the judge
Read from stdin, write to stdout. Sample cases below show the exact format.
Sample cases
Example 1
Input
5
1 2 2 3 3Expected output
3Example 2
Input
4
7 7 7 7Expected output
1