package main

import (
	"fmt"
	"math/big"
)

func main() {
	var N int
	var x, a int64
	fmt.Scan(&x, &N)
	X := big.NewInt(x)
	ans := big.NewInt(0)
	mod := big.NewInt(1000003)
	tmp := big.NewInt(0)
	for i := 0; i < N; i++ {
		fmt.Scan(&a)
		A := big.NewInt(a)
		ans = ans.Add(ans, tmp.Exp(X, A, mod))
	}
	_, ans = ans.DivMod(ans, mod, tmp)
	fmt.Println(ans)
}