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();

}