#include <iostream>
using namespace std;

#define SIZE 100

int main (void)
{
  int i, x, N = 0;
  int a[SIZE];
  unsigned long ans = 0;

  cin >> x >> N;

  for ( i = 0; i < N; i++ ) { cin >> a[i]; }

  for ( i = 0; i < N; i++ )
  {
    int k;
    unsigned long tmp = 1;
    for ( k = 0; k < a[i]; k++ )
    {
      tmp *= x;
      tmp %= 1000003;
    }
    ans += tmp;
  }
  cout << ans << endl;
}