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Description

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

Input Format

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

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

Output Format

Print one integers: the number of distinct values.

5
2 3 2 2 3

2

Hint

<li> 1≤n≤2⋅10⁵ </li> <li> 1≤x_i≤10⁹ </li>

Source

CSES