// UUID: 2485d7dc-0e33-4c92-b018-ac7c6217f84f
#include <bits/stdc++.h>
using namespace std;

int main() {
	int n;
    cin >> n;
    vector<long long> es (n);
    set<long long> b;
    for (int i = n-1; i >= 0; i--) {
        cin >> es[i];
        b.insert(es[i]);
    }
    int size = b.size();
    set<long long> a;
    for (int i = 0; i < n; i++) {
        a.insert(es[i]);
        if (a.size() == size) {
            cout << n-i;
            return 0;
        }
    }
}