fn read_line()->String{
    let mut x = String::new();

    let r = std::io::stdin().read_line(& mut x);

    x
}

fn bin_pow(x:u64, mut n:u64)->u64{

    let mut y:u64 = 1;
    let mut p:u64 = x;

    while n > 0{
        if n % 2 == 0 {
            p = (p % 1000003) * (p % 1000003);
            n /= 2;
        }
        else{
            y = (y%1000003) * (p % 1000003);
            n -= 1;
        }

    }
    y
}


fn main() {
    let a = read_line();
    let a_array:Vec<&str> = a.split(' ').collect();
    let base = a_array[0].parse::<u64>().unwrap();
    let b = read_line();
    let trimed_b = b.trim();
    let numbers_s: Vec<&str> = trimed_b.split(' ').collect();
    let mut sum:u64 = 0;
    for num_s in numbers_s{
        let num= num_s.parse::<u64>().unwrap();
        //println!("{}", base);

        sum += bin_pow(base, num)%1000003;
        sum = sum % 1000003;
    }

    println!("{}", sum);



}