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

namespace keses
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = Convert.ToInt32(Console.ReadLine());
            int[] t = Console.ReadLine().Split().Select(int.Parse).ToArray();
            Dictionary<int, long> d = new Dictionary<int, long>();
            int hely = 1;
            for (int i = 0; i < n; i++)
            {
                if (!d.ContainsKey(t[i]))
                {
                    d.Add(t[i], 0);
                }
                d[t[i]] = i;
            }var x = d.ToList();
            var y = x.Min(X => X.Value);
            Console.WriteLine(y + 1);
            Console.ReadKey();
        }
    }
}