p = 10**6+3
def pow(x,m):
    if m==0:
        return 1
    if m==1:
        return x
    if m%2==0:
        return (pow(x,m//2)**2)%p
    else:
        return (x*(pow(x,(m-1)//2)**2)%p)%p
x,N = map(int,input().split())
A = list(map(int,input().split()))
ans = 0
for i in range(N):
    n = A[i]
    ans = (ans+pow(x,n))%p
print(ans)