require 'pp'

MOD = 1000003

def pow(x, a)
  if a === 0
    return 1
  end
  p = 1
  while a > 0 do
    if a % 2 > 0
      p = (p * x) % MOD
    end
    x = (x * x) % MOD
    a /= 2
  end
  return p
end

x, n = gets.strip.split.map { |e| e.to_i }
a = gets.strip.split.map { |e| e.to_i }

# pp a.map { |e|  pow(x, e)}
total = a.reduce(0){|sum, p| (sum + pow(x, p)) % MOD}
puts total