Mediumhashsetarrays
Count Distinct Elements
Time limit 2 s · Memory 64 MBAcceptance: —Solved by: 0
Statement
The first line contains n, the second line contains n integers. Print how many distinct values the array contains.
Examples
Example 1
Input
5 1 2 2 3 3
Output
3
Example 2
Input
6 4 4 4 4 4 4
Output
1
Constraints
- 1 ≤ n ≤ 10^5
- -10^9 ≤ a_i ≤ 10^9