title: What is ".in" file in java that is for inputs?
body: <p>in a Programming Contest, I found at the start of each problem such of these</p>
  <blockquote>
  <p>Program :    vote (cpp|java)</p>
  <p>Input:   vote.in</p>
  <p>Baloon Color:     Gold</p>
  </blockquote>
  <p>what is the &quot;.in&quot; extension and the Baloon Color ?</p>