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: Runtime Error)

#include<stdio.h>
int main(){
    int a, b, c[999], i, j, w, s;
    scanf("%d %d",a, b);
    for ( i = 0; i < a; i++)
    {
        scanf("%d",c[i]);
    }
    
    for ( i = 0; i < a; i++)
    {
        for (j = (i + 1); j < a; j++)
        {
            if (c[i] > c[j])
            {
                w = c[i];
                c[i] = c[j];
                c[j] = w;
            }
            
        }
        
    }
    
    for ( i = 0; i < b; i++)
    {
        s = s + c[i];
    }
    printf("%d",s);
    return 0;
}