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: Wrong Answer)

program sample
implicit none

integer(8) :: N, K, i, sum, m
integer(8), allocatable:: p(:)

read(*,*) N, K
allocate(p(N))
read(*,*) p

if(N > 1)then
do i = 1, N-1
if(p(i) > p(i+1))then
m=p(i)
p(i)=p(i+1)
p(i+1)=m
endif
end do

sum = 0
do i = 1, K
sum = sum + p(i)
end do

write(*,*) sum
end if

if(N == 1)then
sum = p(1)
write(*,*) sum
end if

deallocate(p)
stop

end program sample