Problem:
Score : 200 points

Problem Statement

A shop sells N kinds of fruits, Fruit 1, \ldots, N, at prices of p_1, \ldots, p_N yen per item, respectively. (Yen is the currency of Japan.)

Here, we will choose K kinds of fruits and buy one of each chosen kind. Find the minimum possible total price of those fruits.

Constraints

1 \leq K \leq N \leq 1000

1 \leq p_i \leq 1000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N K
p_1 p_2 \ldots p_N

Output

Print an integer representing the minimum possible total price of fruits.

Sample Input 1

5 3
50 100 80 120 80

Sample Output 1

210

This shop sells Fruit 1, 2, 3, 4, and 5 for 50 yen, 100 yen, 80 yen, 120 yen, and 80 yen, respectively.

The minimum total price for three kinds of fruits is 50 + 80 + 80 = 210 yen when choosing Fruit 1, 3, and 5.

Sample Input 2

1 1
1000

Sample Output 2

1000

Solution in Kotlin (1.3.71) (judge verdict: Wrong Answer)

fun main() {
    val k = readLine()!!.split(' ')[1].toInt()
    var mink = 0
    var sum = 0
    val p = readLine()!!.split(' ').map { it.toInt() }
    for(i in p.indices) {
        if(i < k) {
            sum += p[i]
            if(mink < p[i]) mink = p[i]
        }
        else if(mink > p[i]){
            sum -= mink
            mink = p[i]
            sum += mink
        }
    }
    println(sum)
}