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 (Clang 3.8.0) (judge verdict: Accepted)


#include <stdio.h>



int main(void)
{
	//変数の宣言
	int N,i;
	int ans;
	
	//データの読み込み
	scanf("%d %d",&N,&i);
//	printf("nは%dです\n", n);
//	printf("データの読み込み終了\n");
	//実際の処理
	
	ans = N-i+1;
	
//	printf("計算部分終了\n");
	
	//出力
	
	printf("%d",ans);
	
//	printf("結果の出力終了\n");
	
	return 0;
}