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: Wrong Answer)

#include<stdio.h>

int main(void)
{
	unsigned long int a, b, c[1000], temp;
	unsigned long int sum = 0;
	int i, j;

	scanf("%ld%ld", &a, &b);

	for (i = 0; i < a; i++) {
		scanf("%ld", &(c[i]));
	}

	for (i = a; i > 0; i--) {
		for (j = 0; j < i; j++) {
			if (c[j] > c[j + 1]) {
				temp = c[j];
				c[j] = c[j + 1];
				c[j + 1] = temp;
			}
		}
	}

	for (i = 0; i < b; i++) {
		sum = sum + c[i];
	}

	printf("%ld", sum);

	return 0;
}