# -*- coding: utf-8 -*-

M = 1000003

def rec_pow(x,n):
    if n == 0:
        return 1
    elif n%2 == 0:
        return (rec_pow(x*x%M, n//2))
    else:
        return (rec_pow(x*x%M, n//2) * x) % M

xN = list(map(int, input().split()))
a = list(map(int, input().split()))
x = xN[0]
N = xN[1]
    
ans = 0
for e in a:
    ans += rec_pow(x, e) % M
ans %= M

print(ans)