Driver code
In = [ 4 , 2 , 5 , 1 , 3 , 6 ] NEW_LINE pre = [ 1 , 2 , 4 , 5 , 3 , 6 ] NEW_LINE n = len ( In ) NEW_LINE print ( " Postorder ▁ traversal ▁ " ) NEW_LINE printPostOrder ( In , pre , n ) NEW_LINE