using System;

public class Hello
{
    static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = Array.ConvertAll(line, long.Parse);
        getAns(n, a);
    }
    static void getAns(int n, long[] a)
    {
        var t = 0L;
        for (int i = n - 1; i >= 0; i--)
        {
            var s = a[i] + t;
            if (s % (i + 1) == 0) { t += s / (i + 1); continue; }
            else { Console.WriteLine("No"); return; }
        }
        Console.WriteLine("Yes");
    }
}