x , N =map(int,input().split())
y = 0
n =1000003
l ={i+1:0 for i in range(n-1)}
l[1] = x
for i in range(2,n):
    l[i] = (l[i-1]*x)%n
ans = 0
for i in map(int,input().split()):
    ans += l[ i -((i-1)//(n-1))*(n-1) ]
print(ans%n)