#include <bits/stdc++.h>
using namespace std;

long power(long x, int a) {
    if (a == 0) return 1;
    if (a % 2 == 0) {
        return power(x * x % 1000003, a / 2);
    } else {
        return power(x * x % 1000003, a / 2) * x % 1000003;
    }
}

int main()
{
    int x, n, s = 0;
    cin >> x >> n;
    for (int i = 0; i < n; i++) {
        int a;
        cin >> a;
        s += power(x, a);
    }
    cout << s % 1000003 << endl;
}