A10883 | April Fools' Problem (easy)

The marmots have prepared a very easy problem for this year's HC $^{2}$ – this one. It involves numbers $n$ , $k$ and a sequence of $n$ positive integers $a_{1},a_{2},...,a_{n}$ . They also came up with a beautiful and riveting story for the problem statement. It explains what the input means, what the program should output, and it also reads like a good criminal.

However I, Heidi, will have none of that. As my joke for today, I am removing the story from the statement and replacing it with these two unhelpful paragraphs. Now solve the problem, fools!

The first line of the input contains two space-separated integers $n$ and $k$ ( $1<=k<=n<=2200$ ). The second line contains $n$ space-separated integers $a_{1},...,a_{n}$ ( $1<=a_{i}<=10^{4}$ ).

Output one number.