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();

}