from itertools import combinations

N, P, Q = map(int, input().split())
A = list(map(int, input().split()))
A.sort()


m = max(A) + 10
memo10 = [-1] * m
memo9 = [-1] * m
memo7 = [-1] * m
memo5 = [-1] * m


def f10(x):
    if memo10[x] != -1: return memo10[x]
    res = pow(10, x, P)
    memo10[x] = res
    return res


def f9(x):
    if memo9[x] != -1: return memo9[x]
    res = pow(9, x, P)
    memo9[x] = res
    return res


def f7(x):
    if memo7[x] != -1: return memo7[x]
    res = pow(7, x, P)
    memo7[x] = res
    return res


def f5(x):
    if memo5[x] != -1: return memo5[x]
    res = pow(5, x, P)
    memo5[x] = res
    return res


ans = 0
for a, b, c, d in combinations(A, 4):
    x = f10(a)
    x += f9(b)
    x += f7(c)
    x += f5(d)
    if x % P == Q:
        ans += 1

print(ans)