URAL1053[Pinocchio]

推荐去看NOCOW的翻译,而不是百度一下题解。


CODE:


/*


PROGRAM: $PROGRAM


AUTHOR: Su Jiao


DATE: 2010-3-27


DESCRIPTION:


$DESCRIPTION


*/


#include <iostream>


using std::cin;


using std::cout;


#include <fstream>


using std::ifstream;


using std::ofstream;


#include <sstream>


using std::stringstream;


using std::endl;


#include <vector>


using std::vector;


#include <string>


using std::string;


#include <stack>


using std::stack;


#include <queue>


using std::queue;


#include <set>


using std::set;


#include <map>


using std::map;


using std::pair;


using std::make_pair;


#include <algorithm>


using std::sort;


#include <cassert>


//using std::assert;


 


class Application


{


      int N;


      vector<int> a;


      static int gcd(int a,int b)


      {


             return b?gcd(b,a%b):a;


      }


      public:


      Application()


      {


                   cin>>N;


                   a.resize(N);


                   for (int i=0;i<N;i++) cin>>a[i];


      }


      int run()


      {


          int answer=a[0];


          for (int i=1;i<N;i++) answer=gcd(answer,a[i]);


          cout<<answer<<endl;


          return 0;


      }


};


 


int main()


{


    Application app;


    return app.run();


}