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.

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.

Constraints

• $1 \leq K \leq N \leq 1000$
• $1 \leq p_i \leq 1000$
• All values in input are integers.

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

见题面 Input 部分

见题面 Output 部分