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 Kotlin (1.0.0) (judge verdict: Accepted)

import java.util.Arrays
import java.util.ArrayList

const val MOD: Long = (1e9+7).toLong()
fun Double.format(digits: Int) = String.format("%.${digits}f", this)

fun main(args: Array<String>) {
    val (n, k) = readLine()!!.split(" ").map{it.toInt()}

    println(n-k+1)
}