#include <iostream>
#include <lemon/lp.h>
#include <lemon/cplex.h>	// use this for CPLEX
//#include <lemon/glpk.h>	// use this for GLPK

using namespace std;
using namespace lemon;

int main() {
  typedef CplexLp LP;		// use this for CPLEX
  // typedef GlpkLp LP;		// use this for GLPK
  // typedef Lp LP; 		// use this for the default LP solver

  LP lp;

  LP::Col x1 = lp.addCol();
  LP::Col x2 = lp.addCol();

  lp.addRow(0 <= x1 + x2 <= 100);
  lp.addRow(2 * x1 <= x2 + 32);

  lp.colLowerBound(x1, 0);
  lp.colUpperBound(x2, 100);

  lp.max();
  lp.obj(10 * x1 + 6 * x2);
  lp.solve();

  cout << "Objective function value: " << lp.primal() << endl;
  cout << "x1 = " << lp.primal(x1) << endl;
  cout << "x2 = " << lp.primal(x2) << endl;

  return 0;
}