using System;
using System.Net.Sockets;
using System.Net.Http;
using System.Threading.Tasks;
using System.IO;
using System.Linq;

namespace Test
{
    public class Program
    {
        public static void Main()
        {
            int n = int.Parse(Console.ReadLine()); // 5;

            int maxCapacity = 255; // This is the capacity of tank;

            int capacity = 0;

            for(int i = 0; i < n; i ++)
            {
                int currentCapacity = int.Parse(Console.ReadLine()); // Litres of water we get everytime

                if(capacity + currentCapacity <= maxCapacity)
                {
                    capacity += currentCapacity;
                }
                else
                {
                    Console.WriteLine("Insufficient capacity!");
                    continue;

                }
            }

            Console.WriteLine(capacity);

        }

    }


}