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Problem
Given an array, print the count of distinct elements.
Input format
Input
input.txt
- An integer N (1 ≤ N ≤ 100) - N integers
Output format
Output
output.txt
- Number of distinct elements.
Example
input
7 1 2 1 3 2 3 4
output
4
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Sample cases (from the problem)
Sample Case 1
Input
7 1 2 1 3 2 3 4
Expected output
4
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