import sys

input_list = sys.stdin.readlines()

count = 1
get_count = 0
get_value_count = 0
for i in input_list:
  get_values = i.split()
  if count == 1:
    get_value_count = int(get_values[0])
    get_count = int(get_values[1])
  else:
    if get_value_count == 1:
      print(get_values[0])
    else:
      get_values.sort()
      count_value = 1
      p = 0
      for c in get_values:
        if count_value > get_count:
          print(str(p))
        else:
          p = p + int(c)
        count_value = count_value + 1
  count = count + 1