/** What is the sum of the digits of the number 2^1000 ? */
#include "0.hpp"
#include "lib/lint.cpp"

uint sum(string a)
{
  uint suma = 0;
  for(uint i = 0; i < a.size(); i++) suma += (a[i] - '0');
  return suma;
}

int main()
{
  lint a("2");
  lint b("1000");
  lint c = a ^ b;
  cout << sum(c.getd()) << endl;
  return 0;
}