n, p, q = map(int, input().split())
a = list(map(int, input().split()))
a.sort()
ma = a[-1]
p10 = [1] * (ma + 1)
p9 = [1] * (ma + 1)
p7 = [1] * (ma + 1)
p5 = [1] * (ma + 1)
for i in range(0, ma):
	p10[i + 1] = p10[i] * 10 % p
	p9[i + 1] = p9[i] * 9 % p
	p7[i + 1] = p7[i] * 7 % p
	p5[i + 1] = p5[i] * 5 % p

ans = 0
for i in range(n):
	for j in range(i + 1, n):
		for k in range(j + 1, n):
			for l in range(k + 1, n):
				if (p10[a[i]] + p9[a[j]] + p7[a[k]] + p5[a[l]]) % p == q:
					ans += 1

print(ans)