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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

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


/**
 *
 * @author
 *
 *
 *
 */

public class Main {

    public static void main(String[] args) throws IOException {
        MyScanner scanner = new MyScanner();
        PrintStream out = System.out;

        int[] data = scanner.nextIntArray();

        out.println(data[0] - data[1] + 1);

        scanner.reader.close();
        out.close();
    }

    // -----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader reader;

        public MyScanner() {
            this.reader = new BufferedReader(new InputStreamReader(System.in));
        }

        public void close() throws IOException {
            this.reader.close();
        }

        int nextInt() {
            return Integer.parseInt(this.next());
        }

        long nextLong() {
            return Long.parseLong(this.next());
        }

        double nextDouble() {
            return Double.parseDouble(this.next());
        }

        String next() {
            String str = "";
            try {
                str = this.reader.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

        String[] nextStringArray() {
            String[] str = null;
            try {
                str = this.reader.readLine().trim().split(" ");
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

        int[] nextIntArray() {
            String[] data  = nextStringArray();
            int[] a  = new int[data.length];

            for (int i = 0; i < a.length; i++) {
                a[i] = Integer.parseInt(data[i]);
            }

            return a;
        }

        Integer[] nextIntegerArray() {
            String[] data  = nextStringArray();
            Integer[] a  = new Integer[data.length];

            for (int i = 0; i < a.length; i++) {
                a[i] = Integer.parseInt(data[i]);
            }

            return a;
        }

        long[] nextLongArray() {
            String[] data  = nextStringArray();
            long[] a  = new long[data.length];

            for (int i = 0; i < a.length; i++) {
                a[i] = Long.parseLong(data[i]);
            }

            return a;
        }
    }
}