@@ -6,16 +6,20 @@ import heapq

 def file_iter(fil):

     the_line = 0

     while the_line != '':

-        the_line = fil.readline()

-        yield the_line

+        next_line = fil.readline().strip()

+        if next_line != '':

+            # yield int(next_line)

+            yield next_line

+        the_line = next_line

 def sorter(gen, len_):

     the_buffer = []

     for the_line in gen:

-        # print("pushing: ", the_line, end='')

+        # print("pushing: ", the_line)

         heapq.heappush(the_buffer, the_line)

         if len(the_buffer) == len_:

+            # print("buffer_before: ", repr(the_buffer))

             yield heapq.heappop(the_buffer)

         # print("buffer_after: ", repr(the_buffer))

@@ -26,5 +30,5 @@ def sorter(gen, len_):

 if __name__ == '__main__':

     import sys

-    for line in sorter(file_iter(sys.stdin), 10):

-        print(line, end='')

+    for line in sorter(file_iter(sys.stdin), int(sys.argv[1])):

+        print(line)