title: Run Time Error Exited with error status 1
body: <p>The problem is <a href="https://www.spotify.com/nl/jobs/tech/zipfsong/" rel="nofollow">this</a> : 
  I tried to solve it and I think I did too but when I mailed it for evaluation it says </p>
  
  <pre><code>We have tested your solution, and while doing so we unfortunately
  discovered the following error:
  Run Time Error
  
  Exited with error status 1
  </code></pre>
  
  <p>Here is my code : </p>
  
  <pre><code>import re
  import sys
  def fun():
      for ind in ratio:
          max_num = ratio_list[0]
          if ratio[ind] == max_num:
              print ind
  
      ratio_list.remove(ratio_list[0])
  
  hits = []
  song = []   
  n,m = raw_input().split(' ',1)
  
  
  for i in range(0,int(n)):
      h,n = raw_input().split(" ",1)
  
      is_number = isinstance( int(h), int )   
      is_string = len(n)&lt;=30 and bool(re.match('[a-z_0-9]+$', n))
      if not(is_number and is_string):
          sys.exit("Error");
      hits.append(int(h))
      song.append(n)
  ratio = {}
  ratio_list = []
  f_of_i = hits[0]
  counter = 1
  index = 0
  
  for hit in hits:
      ratio_list.append(hit*counter)
      ratio[song[index]] = hit*counter
      index = index +1
      counter = counter +1
  
  ratio_list.sort()
  ratio_list.reverse()
  
  for j in range(0,int(m)):
      fun()
  </code></pre>
  
  <p>What am I doing wrong ? I am curious why the solution is unacceptable killing me.</p>