x, n = map(int, input().split())
A = list(map(int, input().split()))

mod = 1000003

def power(a, n, mod):
    bi=str(format(n,"b"))
    res=1
    for i in range(len(bi)):
        res=(res*res) %mod
        if bi[i]=="1":
            res=(res*a) %mod
    return res

ans = 0
for a in A:
    ans += power(x, a, mod)

print(ans%mod)