#include<iostream>
#include<sstream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<string>
#include<vector>
#include<cmath>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<numeric>
#include<functional>
#include<complex>

using namespace std;
#define BET(a,b,c) ((a)<=(b)&&(b)<(c))
#define FOR(i,n) for(int i=0,i##_end=(int(n));i<i##_end;i++)
#define SZ(x) (int)(x.size())
#define ALL(x) (x).begin(),(x).end()
#define MP make_pair
#define FOR_EACH(it,v) for(__typeof(v.begin()) it=v.begin(),it_end=v.end() ; it != it_end ; it++)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef long long ll_t;
ll_t modpow(ll_t x , ll_t y , ll_t mod){
    x %= mod;
  
    ll_t t = x, res = 1;
    for(; y ; y >>= 1){
        if(y & 1) {
            res = res * t;
            if(res >= mod) res %= mod;
        }
        t = t * t;
        if(t >= mod) t %= mod;
    }
    return res;
}

int main()
{
    int x, N;
    cin>>x>>N;
    int ans = 0 ;
    int mod = 1000003;
    FOR(i,N){
        int a;
        cin>>a;
        ans += modpow(x, a, mod);
        ans %= mod;
    }
    cout<<ans<<endl;
    return 0;
}