Care of Puppy

using System;

namespace CareOfPuppy
{
    class Program
    {
        static void Main(string[] args)
        {
            int food = int.Parse(Console.ReadLine()) * 1000;
            string foodPerDay = Console.ReadLine();

            while (foodPerDay != "Adopted")
            {
                food -= int.Parse(foodPerDay);
                foodPerDay = Console.ReadLine();
            }

            if (food >= 0)
            {
                Console.WriteLine($"Food is enough! Leftovers: {food} grams.");
            }
            else
            {
                Console.WriteLine($"Food is not enough. You need {Math.Abs(food)} grams more.");
            }
        }
    }
}