Distinct elements
Given an array of n integers, you are asked to calculate the number of distinct elements.
Input
The first line of the input contains a single integer n (1 ≤ n ≤ ).
The next line contains n space-separated integers ( ≤ ≤ ).
Output
The program should print the number of distinct elements in the given array.
Examples
Input | Output |
|---|---|
5 | 3 |
Explanation
Distinct elements are 2, 3, and 5
Constraints
Time limit: 2 seconds
Memory limit: 512 MB
Output limit: 1 MB