Problem:
Score : 100 points

Problem Statement

There is an N-car train.

You are given an integer i. Find the value of j such that the following statement is true: "the i-th car from the front of the train is the j-th car from the back."

Constraints

1 \leq N \leq 100

1 \leq i \leq N

Input

Input is given from Standard Input in the following format:

N i

Output

Print the answer.

Sample Input 1

4 2

Sample Output 1

3

The second car from the front of a 4-car train is the third car from the back.

Sample Input 2

1 1

Sample Output 2

1

Sample Input 3

15 11

Sample Output 3

5

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Linq;
class Program
{
    static void Main()
    {
        int[] input = Console.ReadLine().Split().Select(i => int.Parse(i)).ToArray(); 
        //int a=int.Parse(Console.ReadLine());
        //string a = Console.ReadLine();
        
        Console.WriteLine(input[0]-input[1]);
        Console.ReadLine();
    }
}