x, N = map(int, input().split())
A = list(map(int, input().split()))
S = 0
mod = int(1e6) + 3

def doubling(n, m):
    y = 1
    base = n
    tmp = m
    while tmp != 0:
        if tmp % 2 == 1:
            y *= base
            y %= mod
        base *= base
        base %= mod
        tmp //= 2
    return y

for i in A:
    S += doubling(x, i)
    S %= mod
print(S)