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 ord(const void * x, const void * y){
	int a = *((int *) x), b = *((int *) y);
 
	if (a<b)
		return -1;
	if (a>b)
		return 1;
 
	return 0;
 
}

int main() {
    int n, k;
    scanf("%d %d", &n, &k);
    
    int vec[n];
    for (int i = 0; i < n;++i){
        scanf("%d", &vec[i]);
    }
    
    qsort(vec, n, sizeof(vec[0]), ord);
    int a = 0;
    for (int i = 0; i < k; ++i){
        a += vec[i];
    }
    printf("%d\n", a);

    return 0;
}