using System; using System.IO; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Numerics; using System.Diagnostics; using System.Text; using System.Text.RegularExpressions; using System.Threading.Tasks; using static System.Math; class P { static void Main() { Console.ReadLine(); Console.WriteLine(Console.ReadLine().Split().Select(int.Parse).Sum() - int.Parse(Console.ReadLine())); } }