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 Kotlin (1.0.0) (judge verdict: Wrong Answer)

import java.util.* 

fun main(args: Array<String>) {
    val sc = Scanner(System.`in`)
    val a_b_c = sc.nextLine()
            .split(" ")
            .map { Integer.parseInt(it) } 
    val d = a_b_c[0] - a_b_c[1]
    val e = a_b_c[2] - d
    println(e)
}