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 mixjuice

 implicit none
 integer::n,k,temp,i,j,ans
 integer,allocatable::p(:)

 read*,n,k
 allocate(p(n))
 read*,p
! print*,p

!sort

 do i=1,n-1
  do j=1,n-i
   if(p(i)>=p(j+i)) then
    temp=p(j+i)
    p(j+i)=p(i)
    p(i)=temp
   end if
  end do
 end do
!print*,p

ans=0
 do i=1,k
  ans=ans+p(i)
 end do

print*,ans

end program mixjuice