#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class TestTaking {
  public:
    int findMax(int questions, int guessed, int actual);
};

int TestTaking::findMax(int questions, int guessed, int actual)
{
  int actual_false;   /* The number of false answers on the test */
  int false_guesses;  /* The number of false answers that Alice guessed */
  int rv;             /* The return value */

  /* Calculate false and actual_false from questions guessed and actual */

  false_guesses = questions - guessed;
  actual_false = questions - actual;

  /* The return value is the sum of the smaller of guessed and actual, plus
     the smaller of false and actual_false. */

  rv = (guessed > actual) ? actual : guessed;
  rv += ((false_guesses > actual_false) ? actual_false : false_guesses);
  return rv;
}