x, N = map(int, input().split())
A = list(map(int, input().split()))
MOD = 10**6 + 3

from functools import lru_cache


@lru_cache(maxsize=None)
def f(x, n):
    if n == 0:
        return 1
    if n == 1:
        return x
    else:
        return x * f(x, n - 1) % MOD


ans = 0
for a in A:
    ans += f(x, a) % MOD
print(ans % MOD)