import java.util.Scanner

import scala.annotation.tailrec

object Problem016 {

  def mpow(x: Long, e: Int, mod: Int): Int = {
    @tailrec
    def rec(x: Long, e: Int, result: Long): Int = {
      if (e <= 0) return result.toInt

      if (e % 2 == 0) {
        rec(x * x % mod, e / 2, result)
      } else {
        rec(x, e - 1, result * x % mod)
      }
    }
    rec(x, e, 1)
  }

  def proc(x: Int, a: Seq[Int], mod: Int): Int = {
    a.map(mpow(x, _, mod)).sum % mod
  }

  def main(args: Array[String]) {
    val sc = new Scanner(System.in)
    val x = sc.nextInt()
    val N = sc.nextInt()
    val a = Seq.fill(N)(sc.nextInt())

    val result: Int = proc(x, a, 1000003)
    println(result)
  }
}