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

def power(a, b):
    d = len(format(b, 'b'))
    ret = 1
    n = a
    for i in range(d):
        if b & (1 << i) > 0:
            ret *= n
            ret %= MOD
        n = (n**2) % MOD
    return ret

ans = 0
for i in range(N):
    ans += power(x, a[i])
    ans %= MOD
    
print(ans)