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M. April Fools' Problem (easy)
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

The marmots have prepared a very easy problem for this year's HC2 – this one. It involves numbers n, k and a sequence of n positive integers a1, a2, ..., an. 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!

Input

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 a1, ..., an (1 ≤ ai ≤ 104).

Output

Output one number.

Examples
Input
8 5
1 1 1 1 1 1 1 1
Output
5
Input
10 3
16 8 2 4 512 256 32 128 64 1
Output
7
Input
5 1
20 10 50 30 46
Output
10
Input
6 6
6 6 6 6 6 6
Output
36
Input
1 1
100
Output
100