N,P,Q = map(int, input().split())
A = list(map(int, input().split()))
A.sort()
ans = 0
for a in range(N):
    aa = pow(10,A[a],P)
    for b in range(a+1,N):
        bb = pow(9,A[b],P)
        for c in range(b+1,N):
            cc = pow(7,A[c],P)
            for d in range(c+1,N):
                if A[a]<A[b]<A[c]<A[d]:
                    if (aa+bb+cc+pow(5,A[d],P))%P==Q:
                        ans+=1
print(ans)