#include <iostream>
#include <string>
#include <vector>

using namespace std;
typedef long long LL;
const LL MOD = 1000003;

LL modpow_internal(LL M, LL N){
    if(N <= 0) return 1;
    LL ans = modpow_internal(M, N/2);
    ans = ans*ans%MOD;
    if(N%2 == 1) ans = ans*M%MOD;
    return ans;
}

LL modpow(LL M, LL N){
    if(N == 0) return 1;
    if(M == 0) return 0;
    return modpow_internal(M, N);
}


int main(){
    LL x = 0, N = 0;
    cin >> x >> N;
    LL ans = 0;
    for(int i = 0; i < N; i++){
        LL a;
        cin >> a;
        ans += modpow(x, a);
        ans %= MOD;
    }
    cout << ans << endl;
    return 0;
}