using System.Collections.Generic;
using System.Numerics;
using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var p = int.Parse(line[1]);
        var q = int.Parse(line[2]);
        line = Console.ReadLine().Trim().Split(' ');
        var a = Array.ConvertAll(line, int.Parse);
        getAns(n, p, q, a);
    }
    static void getAns(int n, int p, int q, int[] a)
    {
        var xx = (long)BigInteger.ModPow(7, 128, 17);
        
        Array.Sort(a);
        var d10 = new Dictionary<int, long>();
        var d9 = new Dictionary<int, long>();
        var d7 = new Dictionary<int, long>();
        var d5 = new Dictionary<int, long>();
        foreach (var x in a)
        {
            d10[x] = (long)BigInteger.ModPow(10, x, p);
            d9[x] = (long)BigInteger.ModPow(9, x, p);
            d7[x] = (long)BigInteger.ModPow(7, x, p);
            d5[x] = (long)BigInteger.ModPow(5, x, p);
        }
        var c = 0;
        for (int i = 0; i < n - 3; i++)
        {
            for (int j = i + 1; j < n - 2; j++)
            {
                for (int k = j + 1; k < n - 1; k++)
                {
                    for (int L = k + 1; L < n; L++)
                    {
                        var w = d10[a[i]];
                        w += d9[a[j]];
                        w %= p;
                        w += d7[a[k]];
                        w %= p;
                        w += d5[a[L]];
                        w %= p;
                        if (w == q) c++;
                    }
                }
            }
        }
        Console.WriteLine(c);
    }
}