using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var N = int.Parse(Console.ReadLine());
        var count = 0;

        var sum = 0;
        var input = Console.ReadLine();
        if (input.Length == 0) count = 101;
        else
        {
            sum = input.Split().Select(int.Parse).Sum();
            for (int i = 0; i <= 100; i++)
            {
                if ((sum + i) % N == 0) count++;
            }
        }
        Console.WriteLine(count);
    }
}