N, P, Q=map(int, input().split())
A=list(map(int, input().split()))
_10=[]
_9=[]
_7=[]
_5=[]
ans=0
for i in range(N):
  _10.append(pow(10, A[i], P))
  _9.append(pow(9, A[i], P))
  _7.append(pow(7, A[i], P))
  _5.append(pow(5, A[i], P))
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 (_10[a]+_9[b]+_7[c]+_5[d])%P==Q:
          ans+=1
print(ans)