text: #include <pair.h>
  #include <iostream>
  
  
  Pair::Pair(const int &a, const int &b){
      pa = new int(a);
      pb = new int(b);
  }
  
  Pair::Pair(const Pair &others){
      pa = new int(*(others.pa));
      pb = new int(*(others.pb));
  }
  
  Pair::~Pair(){
      delete pa;
      delete pb;
  
      pa = nullptr;
      pb = nullptr;
  }
  