N,P,Q=map(int,input().split())
A=list(map(int,input().split()))
A.sort()
pow10=[pow(10,a,P) for a in A]
pow9=[pow(9,a,P) for a in A]
pow7=[pow(7,a,P) for a in A]
pow5=[pow(5,a,P) for a in A]
ans=0
for a in range(N):
    for b in range(a+1,N):
        for c in range(b+1,N):
            for d in range(c+1,N):
                if (pow10[a]+pow9[b]+pow7[c]+pow5[d])%P==Q:
                    ans+=1
print(ans)