package main

import (
	"fmt"
)

func main() {
	solve()
}

func solve(){
	var x, N, a, ans int
	fmt.Scan(&x, &N)
	for i:=0; i<N; i++{
		fmt.Scan(&a)
		ans += pow(x, a)
		ans = ans%MOD
	}
	fmt.Println(ans)
}

const MOD = 1000003
func pow(x, a int)int{
	if a == 0{
		return 1
	}else if a%2==0{
		return pow(x*x%MOD, a/2)
	}else{
		return pow(x*x%MOD, a/2)*x%MOD
	}
}