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Contest: Task: Related: TaskB

Score : $100$ points

Problem Statement

We have removed $A$ balls from a box that contained $N$ balls and then put $B$ new balls into that box. How many balls does the box contain now?

Constraints

  • All values in input are integers.
  • $ 100 \leq N \leq 200$
  • $ 1 \leq A,B \leq 100$

Input

Input is given from Standard Input in the following format:

$N$ $A$ $B$

Output

Print the answer as an integer.

Sample Input 1

100 1 2

Sample Output 1

101

The box contained $100$ balls. After removing $1$ ball and putting $2$ new balls, it now contains $101$ balls.

Sample Input 2

100 2 1

Sample Output 2

99

Sample Input 3

100 1 1

Sample Output 3

100