x, N = map(int, input().split())
As = list(map(int, input().split()))

def solve(x, N, As):
    mod = 10**6 + 3
    dp = [1]
    maxA = max(As)
    val = x
    while maxA:
        dp.append(val)
        val *= val
        val %= mod
        maxA >>= 1
    ans = 0
    for a in As:
        val = 1
        i = 0
        while a:
            i += 1
            if a & 1:
                val *= dp[i]
                val %= mod
            a >>= 1
        ans += val
    return ans % mod

print(solve(x, N, As))