using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace késés
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int[] szm = Console.ReadLine().Split().Select(int.Parse).ToArray();
            Dictionary<int, long> k = new Dictionary<int, long>();
            int hely = 1; 
            for (int i = 0; i < N; i++)
            {
                if (!k.ContainsKey(szm[i]))
                {
                    k.Add(szm[i], 0);
                }
                k[szm[i]] = i;
            }
            var x = k.ToList();
            var y = x.Min(X => X.Value);
            Console.WriteLine(y + 1);
            Console.ReadKey();
        }
    }
}