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 C (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <stdlib.h>

int compint(const void *a, const void *b) {
    int an = *(int*) a;
    int bn = *(int*) b;
    
    return an - bn;
}

int main () {
    int n, k;
    int p[1003];
    int ans = 0;
    scanf("%d %d", &n, &k);
    for (int i=0; i<n; i++) {
        scanf("%d", &p[i]);
    }
    qsort(p, n, sizeof(int), compint);

    for (int i = 0; i < k; i++) {
        ans += p[i];
    }
    printf("%d\n", ans);
    return 0;
}