URAL1014[The Product of Digits]

水题，就是要注意一下细节。特殊对待N=0和1的情况。

CODE:

/*

PROGRAM: $PROGRAM

AUTHOR: Su Jiao

DATE: 2010-3-13

DESCRIPTION:

$DESCRIPTION

*/

#include <iostream>

using std::cin;

using std::cout;

using std::endl;

#include <sstream>

using std::stringstream;

#include <vector>

using std::vector;

#include <string>

using std::string;

#include <stack>

using std::stack;

#include <queue>

using std::queue;

#include <map>

using std::map;

using std::pair;

using std::make_pair;

#include <algorithm>

using std::sort;

#include <cassert>

//using std::assert;

 

class Application

{

      static const int BASE=10;

      int N;

      vector<int> counter;

      public:

      Application()

                   :counter(BASE,0)

      {

                    cin>>N;

      }

      int run()

      {

          if (N==0) cout<<10<<endl;

          else if (N==1) cout<<1<<endl;

          else

          {

              for (int i=BASE-1;i>1;i–)

                  while (N%i==0)

                  {

                        N/=i;

                        counter[i]++;

                  }

              if (N!=1) cout<<-1<<endl;

              else

              {

                  for (int i=0;i<BASE;i++)

                      for (int j=0;j<counter[i];j++)

                          cout<<i;

                  cout<<endl;

              }

          }

          return 0;

      }

};

 

int main()

{

    Application app;

    return app.run();

}