import itertools

x, a = map(int, input().split())
inpls = list(map(int,input().split()))

def rem(x,n,d=1000003):
    if n == 0:
        return 1
    else:
        ls = [2**i for i in range(26,-1,-1)]
        ac = []
        for i in ls:
            if n - i >= 0:
                n -= i
                ac.append(i)

        rm = 1
        for i in ac:
            r = x**i%d
            rm *= r
        return rm%d

sm = 0
for i in inpls:
    sm += rem(x,i)

print(sm%1000003)