#include <iostream>
using namespace std;
 
class A
{
   int val = 55;
 
   public:
  void write(int i){
    val = i;
  }
  static void read(){
    cout << val;
  }
};

int main(int argc, char const *argv[])
{
  A a = A();
  a.write(10);
  a.read();
  return 0;
}