def main()
  var n = read_int()
  if n <= 0
    return
  end
  while 1
    var values = read_ints(n)
    if !$values
      break
    end
    write_int(sum(values))
  end
end

def sum(values: Int[]): Int
  var ret = 0
  for v in values
    ret += v
  end
  return ret
end