n, p, q = map(int, input().split())
a = list(map(int, input().split()))
a.sort()

ans = 0
for i in range(n):
    for j in range(i+1, n):
        for h in range(j+1, n):
            for k in range(h+1, n):
                tmp = pow(10, a[i], p) + pow(9, a[j], p) + pow(7, a[h], p) + pow(5, a[k], p)
                tmp %= p
                if tmp == q:
                    ans += 1
print(ans)