#include<stdio.h>
#include<stdlib.h>

typedef long long int ln;

ln calcPow(int r,ln n,int mod){
  if(n==0) return 1;

  ln t=calcPow(r,n/2,mod);
  return (((t*t)%mod)*(n%2==0?1:r))%mod;
}

void run(void){
  const int m=1000003;
  int x,n;
  scanf("%d%d",&x,&n);

  ln ans=0;
  while(n>0){
    ln a;
    scanf("%lld",&a);
    ans+=calcPow(x,a,m);;
    n--;
  }
  ans%=m;
  printf("%lld\n",ans);
  return;
}

int main(void){
  run();
  return 0;
}