URAL1073[Square country]

简单的DP。


CODE:


/*


PROGRAM: $PROGRAM


AUTHOR: Su Jiao


DATE: 2010-4-8


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;


using std::priority_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;


      public:


      Application()


      {


                   cin>>N;


      }


      int run()


      {


          vector<int> f(N+1,N);


          f[0]=0;


          for (int i=1;i<=N;i++)


          {


              for (int j=1;j*j<=i;j++)


                  if (f[i-j*j]+1<f[i]) f[i]=f[i-j*j]+1;


          }


          cout<<f[N]<<endl;


          return 0;


      }


};


 


int main()


{


    Application app;


    return app.run();


}