#include <iostream>
#include <set>

using namespace std;

int main()
{
  int candidate;

  cout << "Mata in ett heltal: ";
  cin >> candidate;

  set<int> history{};

  while ( history.insert(candidate).second )
  {
    int sqare_sum{0};
    
    for ( char c : to_string(candidate) )
    {
      sqare_sum += (c - '0')*(c - '0');
    }
    candidate = sqare_sum;
  }

  if (candidate == 1)
    cout << "Det är ett glatt tal!" << endl;
  else
    cout << "Sekvensen upprepas vid " << candidate << '.' << endl;
  
  return 0;
}