macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        #[allow(unused_mut)]
        let mut s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};

    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };

    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };

    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };

    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };

    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}

#[allow(dead_code)]
type Pi = (i32, i32);
fn pri<T: std::fmt::Display>(x: T) {println!("{}", x);}

// Modint
const MOD: u32 = 1_000_003;
#[derive(Clone, Copy)]
struct Mint(u32);
impl std::ops::Add for Mint {
    type Output = Mint;
    fn add(self, x: Mint) -> Mint {
        let res = self.0 + x.0;
        Mint(if res >= MOD {res-MOD} else {res})
    }
}
impl std::ops::AddAssign for Mint {
    fn add_assign(&mut self, x: Mint) {
        *self = *self + x;
    }
}
impl std::ops::Sub for Mint {
    type Output = Mint;
    fn sub(self, x: Mint) -> Mint {
        let res = self.0 + MOD - x.0;
        Mint(if res >= MOD {res-MOD} else {res})
    }
}
impl std::ops::SubAssign for Mint {
    fn sub_assign(&mut self, x: Mint) {
        *self = *self - x;
    }
}
impl std::ops::Mul for Mint {
    type Output = Mint;
    fn mul(self, x: Mint) -> Mint {Mint((self.0 as u64 * x.0 as u64 % MOD as u64) as u32)}
}
impl std::ops::MulAssign for Mint {
    fn mul_assign(&mut self, x: Mint) {
        *self = *self * x;
    }
}
impl std::ops::Div for Mint {
    type Output = Mint;
    fn div(self, x: Mint) -> Mint {
        let mut a = x.0 as i64; //solves au + mv = 1 and u = a^-1
        let mut m = MOD as i64; let mut u = 1i64; let mut v = 0i64;
        let mut buf: i64;
        while m != 0 {
            let t = a / m;
            a -= t * m; buf = a; a = m; m = buf;
            u -= t * v; buf = u; u = v; v = buf;
        }
        u %= m;
        if u < 0 {u += m;}
        self * Mint(u as u32)
    }
}
impl std::ops::DivAssign for Mint {
    fn div_assign(&mut self, x: Mint) {
        *self = *self / x;
    }
}
impl std::fmt::Display for Mint {
    fn fmt<'a>(&self, f: &mut std::fmt::Formatter<'a>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}
#[allow(dead_code)]
impl Mint {
    pub fn pow(self, mut n: u32) -> Mint {
        let mut res = Mint(1); let mut r = self;
        while n > 0 {
            if n & 1 == 1 {res *= r;}
            r *= r;
            n >>= 1;
        }
        res
    }
    pub fn inv(self) -> Mint {
        assert!(self.0 > 0);
        self.pow(MOD - 2)
    }
}

fn main() {
    input!{
        x: u32, n: usize, a: [u32; n],
    }
    let x = Mint(x);
    let mut ans = Mint(0);
    for e in a {
        ans += x.pow(e);
    }
    pri(ans);
}