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 Fortran (GNU Fortran 9.2.1) (judge verdict: Accepted)

program juice
	implicit none
    integer :: n, k, i, m, j
    integer,allocatable :: p(:)
    
    read(*,*) n, k
    allocate(p(n))
    
    read(*,*) p
    
    do i = n, 2, -1
    	do j = 1, i-1
        	if ( p(j)>=p(j+1) ) then
            	m = p(j+1)
                p(j+1) = p(j)
                p(j) = m
            end if
        end do
    end do
    
    write(*,*) sum(p(1:k))
    
    stop
end program juice