N,P,Q=map(int,input().split())
A=list(map(int,input().split()))
L=[[0 for _ in range(4)]for _ in range(N)]
for i in range(N):
    for j in range(4):
        L[i][j]=pow([10,9,7,5][j],A[i],P)

ans=0
for i in range(N):
    for j in range(i+1,N):
        for k in range(j+1,N):
            for m in range(k+1,N):
                if (L[i][0]+L[j][1]+L[k][2]+L[m][3])%P==Q:
                    ans+=1
print(ans)