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 Pascal (FPC 3.0.4) (judge verdict: Accepted)

program main;
var 
    a, b, i, k, ans, temp : integer;
    ar : array[1..1000] of integer;
begin
    ans := 0;
    readln(a, b);
    for i := 1 to a do 
        read(ar[i]);
    for i := 1 to a do 
        for k := 1 to a-1 do 
            if ar[k] > ar[k+1] then 
                begin 
                    temp := ar[k];
                    ar[k] := ar[k+1];
                    ar[k+1] := temp;
                end;
    for i := 1 to b do 
        ans := ans + ar[i];
    writeln(ans);
end.