text: //
  //  main.cpp
  //  prob3_3
  //
  //  Created by YUAN JI on 2018-09-17.
  //  Copyright © 2018 YUAN JI. All rights reserved.
  //
  
  #include <iostream>
  
  int main(int argc, const char * argv[]) {
      // insert code here...
      std::cout << "Hello, World!\n";
      return 0;
  }
  