title: I really can't figure out where to start
body: <p>By using 9 numbers which are 1 to 9 you should find the number of ways to get N using multiplication and addition.</p>
  
  <p>For example, if 100 is given, you would answer 7.</p>
  
  <p>The reason is that there are 7 possible ways.</p>
  
  <pre><code>100 = 1*2*3*4+5+6+7*8+9
  
  100 = 1*2*3+4+5+6+7+8*9
  
  100 = 1+2+3+4+5+6+7+8*9
  
  100 = 12+3*4+5+6+7*8+9
  
  100 = 1+2*3+4+5+67+8+9
  
  100 = 1*2+34+5+6*7+8+9
  
  100 = 12+34+5*6+7+8+9
  </code></pre>
  
  <p>If this question is given to you, how would you start?</p>