#include <bits/stdc++.h>
#define gyorsan ios::sync_with_stdio(0);cin.tie(0)

using namespace std;

int main() {
    gyorsan;

    int idopill;
    vector<int> evsz;

    cin >> idopill;

    for(int i = 0; i < idopill; i++) {
        int ev;
        cin >> ev;
        evsz.push_back(ev);
    }

    for(int i = 1; i < evsz.size(); i++) {
        if(evsz[i] == evsz[0]) {
            cout << i+1 << endl;
            break;
        }
    }

    return 0;
}