def calc(x, n):
	if n == 0: return 1
	if n % 2 == 1: return (x * calc(x, n-1)) % 1000003
	p = (calc(x, n/2)) % 1000003
	return (p * p) % 1000003

x, N = map(int, raw_input().split())
a = map(int, raw_input().split())
sum = 0
for i in range(0, N):
	sum = (sum + calc(x, a[i])) % 1000003
print sum