title: MapReduce skipping the first line of input file
body: <p>Anyone knows how to skip the first line of the input text file in MapReduce? For example, I have a following input file:</p>
  
  <pre><code>Student Score
  00001   90
  00002   95
  00003   90
        .
        .
        .
  </code></pre>
  
  <p>Now, I would like to count the frequency of each scores. But I have to skip the first line, which is the title (Student, Score), right? How can I do this? In contratry, if I want to add a title row in the output file of the MapReduce (Score, Frequency), how can I do this? Thanks in advance!</p>