import itertools
import sys
from typing import Callable, List, NoReturn


def main() -> NoReturn:
    readline: Callable[[], str] = sys.stdin.readline
    n, k = map(int, readline().rstrip().split())  # type: int,...
    p: List[int] = [int(_) for _ in readline().rstrip().split()]

    print(sum(p.sort()[:k]))


if __name__ == '__main__':
    main()
