N, P, Q = map(int, input().split())
A = list(map(int, input().split()))
A.sort()
from collections import defaultdict

five = defaultdict(int)
seven = defaultdict(int)
nine = defaultdict(int)
ten = defaultdict(int)
for a in A:
    five[a] = pow(5, a, P)
    seven[a] = pow(7, a, P)
    nine[a] = pow(9, a, P)
    ten[a] = pow(10, a, P)
ans = 0
for a in range(N):
    for b in range(a + 1, N):
        if A[a] == A[b]:
            continue
        for c in range(b + 1, N):
            if A[b] == A[c]:
                continue
            for d in range(c + 1, N):
                if A[c] == A[d]:
                    continue
                tmp = ten[A[a]] + nine[A[b]] + seven[A[c]] + five[A[d]]
                if tmp % P == Q:
                    ans += 1
print(ans)