using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, l, h) = (c[0], c[1], c[2]);
        c = NList;
        var bitmax = 1 << n;
        var ans = 0L;
        for (var b = 1; b < bitmax; ++b)
        {
            var mul = -1;
            var count = 0;
            var tmp = b;
            var lcm = 1L;
            for (var i = 0; i < n; ++i)
            {
                if (tmp % 2 == 1)
                {
                    mul *= -1;
                    ++count;
                    lcm = LCM(lcm, c[i]);
                    if (lcm > h)
                    {
                        lcm = -1;
                        break;
                    }
                }
                tmp >>= 1;
            }
            if (lcm > 0)
            {
                ans += (h / lcm - (l - 1) / lcm) * count * mul;
            }
        }
        WriteLine(ans);
    }
    static long LCM(long a, long b)
    {
        var gcd = GCD(a, b);
        return a / gcd * b;
    }
    static long GCD(long a, long b)
    {
        if (a < b) return GCD(b, a);
        if (a % b == 0) return b;
        return GCD(b, a % b);
    }
}