#include <iostream>
#include <stack>
#include <limits>

using namespace std;

bool gyak[1000000001];

int main()
{
    int n, be;
    stack <int> verem;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> be;
        verem.push(be);
    }

    int eleg;
    while(verem.size()) {
        if (!gyak[verem.top()]) {
            eleg = verem.size();
            gyak[verem.top()] = 1;
        }
        verem.pop();
    }
    cout << eleg;
    return 0;
}