import std.algorithm, std.array, std.container, std.range;
import std.string, std.conv, std.math;
import std.stdio, std.typecons;

const long mod = 1000003;

void main()
{
  auto rd = readln.split.map!(to!long);
  auto x = rd[0];
  auto n = rd[1];
  auto ai = readln.split.map!(to!long).array;

  auto pow_table = [x];

  writeln(ai.map!(a => pow(x, a, pow_table)).sum % mod);
}

long pow(long x, long n, long[] pow_table)
{
  auto c = 1;
  for (auto r = 1; n > 0; (r += 1, n >>= 1)) {
    if (pow_table.length < r)
      pow_table ~= (pow_table.back ^^ 2) % mod;
    if ((n & 1) == 1)
      c = (c * pow_table[r - 1]) % mod;
  }

  return c;
}