#include <iostream>
#define FOO 1'000'003
using namespace std;

int main(void){
    long x, N, a, tmp, r, ans = 0;

    cin >> x >> N;
    while(N--){
        cin >> a;
        r = 1;
        tmp = x;
        while(a){
            if(a&1) r = tmp * r % FOO;
            tmp = tmp * tmp % FOO;
            a >>= 1;
        }
        ans = (ans + r) % FOO;
    }
    cout << ans << endl;
    
    return 0;
}