from itertools import combinations


def main():
    N, P, Q = map(int, input().split())
    A = sorted(map(int, input().split()))
    A_10 = [pow(10, a_elm, P) for a_elm in A]
    A_9 = [pow(9, a_elm, P) for a_elm in A]
    A_7 = [pow(7, a_elm, P) for a_elm in A]
    A_5 = [pow(5, a_elm, P) for a_elm in A]
    # divisors = [10, 9, 7, 5]
    # A_mod = [[pow(div_, a_elm, P) for div_ in divisors] for a_elm in A]
    ctr = 0
    for idxs in combinations(range(N), r=4):
        if (A_10[idxs[0]] + A_9[idxs[1]] +
                A_7[idxs[2]] + A_5[idxs[3]]) % P == Q:
            ctr += 1
    print(ctr)


if __name__ == "__main__":
    main()