URAL1023[Buttons]

简单的博弈。巨水。

求满足条件K mod (L+1)=0的最小L。

CODE:

/*

PROGRAM: $PROGRAM

AUTHOR: Su Jiao

DATE: 2010-3-18

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 <map>

using std::map;

using std::pair;

using std::make_pair;

#include <algorithm>

using std::sort;

#include <cassert>

//using std::assert;

 

class Application

{

      int K,L;

      public:

      Application()

      {

                   cin>>K;

      }

      int run()

      {

          //K%(L+1)=0

          for (L=2;L<K;L++)

              if (!(K%(L+1))) break;

          cout<<L%K<<endl;

          return 0;

      }

};

 

int main()

{

    Application app;

    return app.run();

}