#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>

#define ll long long
#define MOD 1000003

using namespace std;

ll POW(ll b,ll e){
    if(e==0) return 1;
    if(e%2) return (b*POW(b,e-1))%MOD;
    else{
        ll r=POW(b,e/2)%MOD;
        return (r*r)%MOD;
    }
}

int main(){

   ll x,n,a;
   cin>>x>>n;
   
   ll ans=0;
   for(int i=0;i<n;++i){
       cin>>a;
       ans+=POW(x,a);
       ans%=MOD;
   }
 
   cout<<ans<<endl;

   return 0;
}