#include <iostream>
using namespace std;
int main() {
    int tab[50000], unikalne = 1, total, temp;
    cin >> total >> tab[0];
    for(int i = 1; i <= total; i++) {
        cin >> temp;
        bool unikalna = true;
        for(int j = 0; j < unikalne; j++) {
            if(tab[j] == temp) {
                unikalna = false;
                break;
            }
        }
        if(unikalna) {
            tab[unikalne] = temp;
            unikalne++;
        }
    }
    cout << unikalne;
}

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OCAzIDIgMSAxIDIgMyAwIC0x

8 3 2 1 1 2 3 0 -1