import java.util.Scanner;

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();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("0");
    }
} import java.util.Scanner; Scanner 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();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("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();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("0");
    } main {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("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 int e = c - (a - b); e c - (a - b) c (a - b) a b if (e >= 0) System.out.println(e);
        else System.out.println("0"); e >= 0 e 0 System.out.println(e) System.out.println System.out System System.out e System.out.println("0") System.out.println System.out System System.out "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();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("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();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("0");
    }
} Main
import java.util.Scanner;

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();
        int e = c - (a - b);

        if (e >= 0) System.out.println(e);
        else System.out.println("0");
    }
}