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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main{

    public static void main(String[] args)  throws IOException {
        // write your code here

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        //int t = Integer.parseInt(reader.readLine());

        String s = reader.readLine();
        String[] inp = s.split(" ");

        int a = Integer.parseInt(inp[0]);
        int b = Integer.parseInt(inp[1]);
        int c = Integer.parseInt(inp[2]);

        int tr = a-b;

        int x = tr-c;

        if(x>=0)
        {
            System.out.println("0");
        }
        else
        {
            System.out.println(c-tr);
        }
    }
}