public int Access(int position)
{
var node = this.Root;
WT_Inner tmp;
for (int i = 0; true; i++) {
if (node.B.Access(position)) {
tmp = node.Right as WT_Inner;
if (tmp == null) {
return (node.Right as WT_Leaf).Symbol;
}
position = node.B.Rank1 (position) - 1;
node = tmp;
} else {
tmp = node.Left as WT_Inner;
if (tmp == null) {
return (node.Left as WT_Leaf).Symbol;
}
position = node.B.Rank0 (position) - 1;
node = tmp;
}
}
}
