#include <stdio.h>
#include <stdlib.h>

#define Z 1000003
int x, N;
long long int a;


int compare_int(const void *a, const void *b);

int main()
{
	int xn[100];
	long long int an[100];
	long long int sum = 0;
	long long int tmp;
	long long int ani;
	scanf("%d %d\n", &x, &N );

	for( int i = 0; i < N - 1 ; i++ ) {
		scanf("%lld ", an+i );
	}
	scanf("%lld\n", an+N-1 );

	qsort( an, N, sizeof( long long int) , compare_int );

	tmp = 1;
	ani = 0;
	for( int i = 0; i <= an[N-1]; i++ ) {
		while( i == an[ani] ) {
			sum += tmp;
			sum = sum %Z;
			ani++;
		}
		tmp = tmp * x;
		tmp = tmp % Z;
	}

	printf("%d\n", sum );


	return 0;
}

int compare_int(const void *a, const void *b)
{
    return *(long long int*)a - *(long long int*)b;
}