Given Tree
root = newnode ( 1 ) NEW_LINE root . left = newnode ( 2 ) NEW_LINE root . right = newnode ( 3 ) NEW_LINE root . left . left = newnode ( 4 ) NEW_LINE root . left . right = newnode ( 5 ) NEW_LINE root . left . right . left = newnode ( 11 ) NEW_LINE root . left . right . right = newnode ( 6 ) NEW_LINE root . left . right . right . left = newnode ( 7 ) NEW_LINE root . left . right . right . right = newnode ( 9 ) NEW_LINE root . right . left = newnode ( 10 ) NEW_LINE root . right . right = newnode ( 8 ) NEW_LINE