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

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl

const ll mod = 1e6 + 3;

// a^b mod p
ll mod_pow(ll a, ll b){
    if(b==0) return 1;
 
    // 肩が奇数
    if(b%2==1){
        return a * mod_pow(a, b-1) % mod;
    }
    else{
        return mod_pow(a*a % mod, b/2) % mod;
    }
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll x, N;
    cin >> x >> N;

    vector<ll> A(N);
    FOR(i, 0, N){
        cin >> A.at(i);
    }

    ll sum = 0;
    FOR(i, 0, N){
        sum += mod_pow(x, A[i]);
        sum %= mod;
    }

    p(sum);
    
    return 0;
}