text: #include<iostream>
  #include<string>
  #include<vector>
  
  using std::cout;
  using std::cin;
  using std::endl;
  using std::vector;
  using std::string;
  
  int main()
  {
  	vector<int> a(10, 2);
  
  	for (auto it = a.begin(); it != a.end(); ++it) {
  		*it = *it * (*it);
  		cout << *it << endl;
  	}
  
  	return 0;
  }