using System.Numerics;

public class Program
{
    public static void Main()
    {

        int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;

        int count = 0;
        for(int i = 0; i < num-1; i++)
        {
            count += int.Parse(str[i]);
        }

        int c = 0; 
        for(int i = 0;i <= 100;i++)
        {
            if((count+i)% num == 0)
            {
                c++;
            }
        }
        Console.WriteLine(c);
    }
}