#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main(){
    ll x, n, ans = 0, mod = 1000003;
    cin >> x >> n;
    for (int i = 0; i < n; i++){
        int a, x1;
        cin >> a;
        x1 = 1;
        while (a){
            x1 *= x;
            x1 %= mod;
            a--;
        }
        ans += x1;
        ans %= mod;
    }
    cout << ans << endl;
}