import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	x, N = getlist()
	A = getlist()
	ans = 0
	for i in range(N):
		ans += pow(x, A[i], 10 ** 6 + 3)

	ans %= 10 ** 6 + 3
	print(ans)



if __name__ == '__main__':
	main()