Problem:
Score : 100 points

Problem Statement

We have two bottles for holding water.

Bottle 1 can hold up to A milliliters of water, and now it contains B milliliters of water.

Bottle 2 contains C milliliters of water.

We will transfer water from Bottle 2 to Bottle 1 as much as possible.

How much amount of water will remain in Bottle 2?

Constraints

All values in input are integers.

1 \leq B \leq A \leq 20

1 \leq C \leq 20

Input

Input is given from Standard Input in the following format:

A B C

Output

Print the integer representing the amount of water, in milliliters, that will remain in Bottle 2.

Sample Input 1

6 4 3

Sample Output 1

1

We will transfer two milliliters of water from Bottle 2 to Bottle 1, and one milliliter of water will remain in Bottle 2.

Sample Input 2

8 3 9

Sample Output 2

4

Sample Input 3

12 3 7

Sample Output 3

0

Solution in Java7 (OpenJDK 1.7.0) (judge verdict: Runtime Error)

import java.util.Scanner;
import java.io.*;

public class Main{
    public static void main(String args[]){
        Scanner scan_A = new Scanner(System.in);
        int  str_A = scan_A.nextInt();

        Scanner scan_B = new Scanner(System.in);
        int str_B = scan_B.nextInt();

        Scanner scan_C = new Scanner(System.in);
        int str_C = scan_C.nextInt();

        int ans;
        int E = str_A - str_B;
        if(E >str_C ){
            ans = 0;
        }else{
           
            ans = str_C -E;
        }
       
               
        System.out.println(ans);
    }

}