Скачать или смотреть Distinct Numbers - CSES Sorting and Searching #1

In this video, I solve the problem 'Distinct Numbers' from https://cses.fi/problemset/task/1621


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The template I use can be found at https://cdn.samyok.us/usaco/template.....

I also stream at   / oksammyoak  , so follow me there! I stream everything from web design to Minecraft :)


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Here's the Problem Statement:

Time limit: 1.00 s Memory limit: 512 MB

You are given a list of n integers, and your task is to calculate the number of distinct values in the list.

Input

The first input line has an integer n: the number of values.

The second line has n integers x1,x2,�,xn.

Output

Print one integers: the number of distinct values.

Constraints
1n2105
1xi109
Example

Input:
5
2 3 2 2 3

Output:
2