#include <iostream>
using namespace std;

int main ()
{
  int a{5};               // initial value: 5
  long b(3);              // initial value: 3
  decltype(b) result;

  cout << "sizeof(result): " << sizeof(result) << endl;
  cout << "sizeof(int): " << sizeof(int) << endl;
  cout << "sizeof(long): " << sizeof(long) << endl;
  
  return 0;
}