#include<cstdio>
#define rep(i,a) for(int i=0;i<(a);++i)

typedef long long ll;

const int mod = 1000003;

ll powMod( ll x, ll n )
{
	ll ret = 1;

	while( n )
	{
		if( n&1 )
			ret = (ret*x)%mod;

		x = (x*x)%mod;
		n >>= 1;
	}

	return ret;
}

int main()
{
	ll x;
	int N;
	scanf( "%lld%d", &x, &N );

	ll ans = 0;
	rep( i, N )
	{
		ll a;
		scanf( "%lld", &a );
		ans = (ans + powMod( x, a )) % mod;
	}

	printf( "%lld\n", ans );

	return 0;
}