x,n = map(int,input().split())
a = list(map(int,input().split()))
div = 1000003
maxa = max(a)
xa = [0 for i in range(maxa+1)]
xa[0] = 1
for i in range(1,maxa+1):
	if xa[i-1]*x >= div:
		xa[i] = (xa[i-1]*x)%div
	else:
		xa[i] = (xa[i-1]*x)
sum = 0
for i in a:
	sum += xa[i]
print(sum%div)