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++14 (GCC 5.4.1) (judge verdict: Accepted)

/*bismillah ->                                                                                                         << Suirkhanov Meyirlan >>
  GL HF


                                                                                                                      42

    bless my code =)
                                                                                                            NEVER FOLLOW YOUR RULES :D HAHAHAHA
*/


///scanf ("%d%d", &x, &y);
///printf("%d", &a)

#include <bits/stdc++.h>

#define fast ios_base::sync_with_stdio();   cin.tie(0);   cout.tie(0);
#define randoperation srand(time(0));
#define pii pair < int , int >
#define pll pair < ll, ll >
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define fast ios_base::sync_with_stdio();   cin.tie(0);   cout.tie(0);
#define randoperation srand(time(0));

using namespace std;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

const ll N = 1e3 + 7;
const ld pi = 3.14159265359;
const int INF = 1e9 + 7;
const double eps = 1e-9;

const int xi[4] = {-1, 0, +1, 0};
const int yj[4] = {0, +1, 0, -1};
const int xxi[4] = {+1, 0, -1, 0};
const int yyj[4] = {0, -1, 0, +1};

ll n, m;

int main(){

  //freopen("bridge.in", "r", stdin);
  //freopen("bridge.out", "w", stdout);

  fast
  randoperation;

  ///           ||
  ///start here \/

  cin >> n >> m;

  cout << (n - m) + 1;
}