#include <iostream>
#include <fstream>

using namespace std;

typedef unsigned char byte;
typedef signed char sbyte;

struct observation
{ unsigned int year: 12,
               month: 4,
               day: 5;
  int mint: 9,
      avgt: 9,
      maxt: 9,
      snow: 11,
      rain: 11,
      wind: 8; };

int main()
{ if (sizeof(observation) != 23)
  { cerr << "Look out! sizeof(observation) is " << sizeof(observation) << ", not 10\n";
    exit(1); }
  cout << "OK so far\n"; }