N,P,Q=map(int,input().split())
A=list(map(int,input().split()))
L=[[0 for _ in range(4)]for _ in range(N)]
t=[10,9,7,5]
for i in range(N):#前計算 O(800*powのやつ)
    for j in range(4):
        L[i][j]=pow(t[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):
                print(i,j,k,m)
                if (
                    
                    L[i][0]+
                    L[j][1]+
                    L[k][2]+
                    L[m][3]
                    )%P==Q: ans+=1
print(ans)