x, n = map(int, input().split())
a = list(map(int, input().split(" ")))
ans = 0
def f(c, n, m):
    if n == 0:
        return 1
    elif n == 1:
        return c%m
    else:
        s = f(c,n//2,m)
        if n % 2 == 0:return (s*s)%m
        else: return (c*s*s)%m
for i in range(n):
    ans += f(x,a[i],1000003)
print(ans%1000003)