#include <cstdio>
using namespace std;

const int MOD = 1000003;

typedef long long LL;

LL pow(LL x, int a){
    if(a == 0) return 1;
    if(a % 2) return (x * pow(x, a-1)) % MOD;
    LL ret = pow(x, a/2) % MOD;
    return (ret * ret) % MOD;
}

int main(){
    LL x, r;
    int n, a;
    scanf("%lld %d", &x, &n);
    r = 0;
    for(int i = 0; i < n; i++){
        scanf("%d", &a);
        r += pow(x, a);
        r %= MOD;
    }
    printf("%lld\n", r);
    return 0;
}