#include<iostream>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include<string>
#include<vector>
#include<cmath>
#include<stack>
#include<queue>
#include<list>
#include<sstream>
#include<algorithm>
#include<map>
#include<complex>
#include<ctime>
#include<set>
using namespace std;


#define li			long long int
#define rep(i,to)	for(li i=0;i<((li)(to));i++)
#define repp(i,start,to)	for(li i=(li)(start);i<((li)(to));i++)
#define pb			push_back
#define sz(v)		((li)(v).size())
#define bgn(v)		((v).begin())
#define eend(v)		((v).end())
#define allof(v)	(v).begin(), (v).end()
#define dodp(v,n)		memset(v,(li)n,sizeof(v))
#define bit(n)		(1ll<<(li)(n))
#define mp(a,b)		make_pair(a,b)
#define rin	rep(i,n)
#define EPS 1e-10
#define ETOL 1e-8
#define MOD 1000003
#define F first
#define S second
#define endl "\n"
#define pp(X)		cout<<X.F<<"\t"<<X.S<<endl
#define p2(a,b)		cout<<a<<"\t"<<b<<endl
#define p3(a,b,c)		cout<<a<<"\t"<<b<<"\t"<<c<<endl

li fastexp(li x, li n){
	if(n==0)return 1;
	li sub=fastexp(x, n/2);
	if(n%2==0)return (sub*sub)%MOD;
	else return (((sub*sub)%MOD)*x)%MOD;
}

int main(){
	ios::sync_with_stdio(false);

	li x, n;
	cin>>x>>n;
	li sum=0;
	rin{
		li a;
		cin>>a;
		sum=(sum+fastexp(x, a))%MOD;
	}
	cout<<sum<<endl;


	return 0;
}