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 b171
 
implicit none
integer :: n, k, z, m, i, j
integer, allocatable :: p(:)
 
read *, n, k
 
allocate(p(1:n))
 
read *, p(:)
 
do j = 1, n-1
 do i = 1, n-1
  if(p(i) > p(i+1)) then
   m = p(i)
   p(i) = p(i+1)
   p(i+1) = m
  end if
 end do
end do

z = 0
 
do i = 1, k
 z = z + p(i)
end do
 
print *, z
 
end program b171