using System.Linq;
using System;

public class Hello
{
    static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        int s;
        if (n == 1) s = 0;
        else
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            s = Array.ConvertAll(line, int.Parse).Sum();
        }
        var count = 0;
        for (int i = 0; i <= 100; i++)
            if ((s + i) % n == 0) count++;
        Console.WriteLine(count);
    }
}