water overflow

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Threading;

namespace ConsoleApp1
{
    class Exam
    {
        static void Main(string[] args)
        {

            int times = int.Parse(Console.ReadLine());
            int capacity = 0;

            for (int i = 0; i < times; i++)
            {
                int litres = int.Parse(Console.ReadLine());

                if (capacity + litres > 255)
                {
                    Console.WriteLine("Insufficient capacity!");
                }
                else
                {
                    capacity += litres;
                }
            }

            Console.WriteLine(capacity);
        }
    }
}