public static void removeLeaves$($IntTree tree$)\{$

tree.overallRoot $=$ removeLeavesHelper$($tree$.$overallRoot$)$;

$\}$

private static IntTreeNode removeLeavesHelper$($IntTreeNode node$)\{$

if $($node $==$ null$)\{$

return null;

$\}$

node.left $=$ removeLeavesHelper$($node$.$left$)$;

node.right $=$ removeLeavesHelper$($node$.$right$)$;

if $($node$.$left $==$ null && node.right $==$ null$)\{$

return null;

$\}$

return node;

$\}$