Train（求从前开始数的第i个数是从n开始数的第几个数）

问题 A: Train

时间限制: 1 Sec  内存限制: 128 MB

题目描述

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≤N≤100
1≤i≤N

输入

Input is given from Standard Input in the following format:

N i

输出

Print the answer.

样例输入

复制样例数据

4 2

样例输出

3

提示

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

/**/
#include <cstdio>
#include <cstring>
#include <cmath>
#include <cctype>
#include <iostream>
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <string>
#include <stack>
#include <queue>

typedef long long LL;
using namespace std;

int main()
{
	//freopen("in.txt", "r", stdin);
	//freopen("out.txt", "w", stdout);

	int n, i;
	scanf("%d %d", &n, &i);
	printf("%d\n", n - i + 1);

	return 0;
}
/**/