Question: You are given a list of 𝑛 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

  • Output: Print one integers: the number of distinct values.

Input:

5 2 3 2 2 3

Output:

2

#include <bits/stdc++.h>
using namespace std;

int main() {
	int N;
	cin >> N;
	vector<int> arr(N);
	for (int i = 0; i < N; i++) cin >> arr[i];
	sort(arr.begin(), arr.end());
	int ans = 1;
	for (int i = 1; i < N; i++) {
		ans += (arr[i] != arr[i - 1]);
	}
	cout << ans << "\n";
	return 0;
}