Problem:
Score : 100 points

Problem Statement

Snuke has N integers: 1,2,\ldots,N.
He will choose K of them and give those to Takahashi.

How many ways are there to choose K consecutive integers?

Constraints

All values in input are integers.

1 \leq K \leq N \leq 50

Input

Input is given from Standard Input in the following format:

N K

Output

Print the answer.

Sample Input 1

3 2

Sample Output 1

2

There are two ways to choose two consecutive integers: (1,2) and (2,3).

Sample Input 2

13 3

Sample Output 2

11

Solution in C (GCC 5.4.1) (judge verdict: Runtime Error)

        #include <stdio.h>
         
        int main() {
            int N, K, a;
            a = scanf("%d %d", &N, &K);
     
            if(N>50 || N <= 1) return -1;
            else if(K > N) return -1;
         
            a = printf("%d", N - K + 1);
            
            return 0;
        }