title: postorder and preorder when some one child is in tree?
body: <p>I have preorder <strong>abcdefg</strong> and post order <strong>cbfgeda</strong> and have final tree as following image but because some of node has one child this is so hard. is there any one can help me a bit more detail how create final tree?</p>
  <p><a href="https://i.stack.imgur.com/h24nX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/h24nX.png" alt="enter image description here" /></a></p>