from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math
input = sys.stdin.readline

x,N = map(int,input().split())
A = list(map(int,input().split()))
mod = 10**6 + 3

ans = 0
for a in A:
    ans += pow(x,a,mod)
    ans %= mod
print(ans)