import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;

public class Main {
  public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  }
} import java.util.Scanner; Scanner java.util import java.util.List; List java.util import java.util.ArrayList; ArrayList java.util public class Main {
  public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  }
} Main public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  } main {

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc int B = sc.nextInt(); B sc.nextInt() sc.nextInt sc int C = sc.nextInt(); C sc.nextInt() sc.nextInt sc System.out.println(Math.max(C - (A - B), 0)) System.out.println System.out System System.out Math.max(C - (A - B), 0) Math.max Math C - (A - B) C (A - B) A B 0 String[] args args public class Main {
  public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  }
} public class Main {
  public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  }
} Main
import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;

public class Main {
  public static void main(String[] args ){

    Scanner sc = new Scanner(System.in);

    int A = sc.nextInt();
    int B = sc.nextInt();
    int C = sc.nextInt();

    System.out.println(Math.max(C - (A - B), 0));

  }
}
