import java.util.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    private static long[] ary;
    public static void main(String[] args) throws Exception {
        long x = nextLong();
        int n = nextInt();
        ary = nextLong(n);
        long ans = 0;
        for (int i = 0;i < n;i++) {
            ans += pow(x, ary[i])%1000003;
        }
        System.out.println(ans);
    }
    
    private static long pow(long n, long p) {
        long ans;
        if (p==0) return 1;
        if (p==1) return n;
        if (p==2) return n*n;
        if (p%2==0) {
            ans = pow(n,p/2)*pow(n,p/2);
        } else {
            ans = pow(n,p/2)*pow(n,p/2)*n;
        }
        System.out.println(n+" "+p+" "+ans);
        return ans%1000003;
    }
    
    private static int nextInt() { return sc.nextInt(); }
    private static long nextLong() { return sc.nextLong(); }
    private static float nextFloat() { return sc.nextFloat(); }

    private static int[] nextInt(int n) {
        int[] ret = new int[n];
        for (int i = 0;i < n;i++) {
            ret[i] = nextInt();
        }
        return ret;
    }

    private static long[] nextLong(int n) {
        long[] ret = new long[n];
        for (int i = 0;i < n;i++) {
            ret[i] = nextLong();
        }
        return ret;
    }

    private static float[] nextFloat(int n) {
        float[] ret = new float[n];
        for (int i = 0;i < n;i++) {
            ret[i] = nextFloat();
        }
        return ret;
    }
}