T RangeTree<T>::GetValueOnInterval(int idx, int subtree_left,
int subtree_right, int searching_left, int searching_right) const {
// printf("GVOI: %d v: %d sl: %d sr: %d sel: %d ser: %d\n", idx,
// tree_[idx], subtree_left, subtree_right, searching_left,
// searching_right);
if (subtree_left == searching_left && subtree_right == searching_right)
return tree_[idx];
const int left_child_boundary = subtree_left - 1
+ GetSubtreeSize(subtree_left,
subtree_right) / 2;
T left_result;
if (IsPointInLeftChild(searching_left, subtree_left, subtree_right)) {
left_result = GetValueOnInterval(GetLeftChild(idx),
subtree_left,
left_child_boundary,
searching_left,
std::min(searching_right,
left_child_boundary));
}
const int right_child_boundary = left_child_boundary + 1;
T right_result;
if (IsPointInRightChild(searching_right, subtree_left, subtree_right)) {
right_result = GetValueOnInterval(GetRightChild(idx),
right_child_boundary,
subtree_right,
std::max(searching_left,
right_child_boundary),
searching_right);
}
if (IsPointInLeftChild(searching_right, subtree_left, subtree_right))
return left_result;
if (IsPointInRightChild(searching_left, subtree_left, subtree_right))
return right_result;
return (*operation_)(left_result, right_result);
}
void RangeTree<T>::UpdatePoint(int point, T value) {
int idx = rounded_capacity_ + point - 1;
tree_[idx] = value;
while (idx != 0) {
idx = GetParent(idx);
tree_[idx] = (*operation_)(tree_[GetLeftChild(idx)],
tree_[GetRightChild(idx)]);
}
}
bool MinHeap<T>::GetMin(T& Item)
{
if (NumElements == 0) return false;
// Min Value is at the top of the heap
Item = Elements[0].Item;
if (NumElements == 1) {
NumElements--;
return true;
}
// Now place the last item in the first spot and sift-down until heap is restored
Elements[0] = Elements[NumElements-1];
NumElements--;
Node* node = &Elements[0];
Node* leftChild = GetLeftChild(node);
Node* rightChild = GetRightChild(node);
while (1) {
if (IsNodeLeaf(node)) break;
if ( (leftChild == NULL && rightChild != NULL) || (IsNodeFull(node) && rightChild->Value <= leftChild->Value) ) {
if (rightChild->Value < node->Value) {
Swap(rightChild, node);
node = rightChild;
}
else break;
}
else if ( (rightChild == NULL && leftChild != NULL) || (IsNodeFull(node) && leftChild->Value <= rightChild->Value) ) {
if (leftChild->Value < node->Value) {
Swap(leftChild, node);
node = leftChild;
}
else break;
}
leftChild = GetLeftChild(node);
rightChild = GetRightChild(node);
}
return true;
}
void PercolateDown(Heap* heap,int i){
int left=GetLeftChild(heap,i);
int right=GetRightChild(heap,i);
int min;
if(left !=-1 && heap->Array[i]>heap->Array[left]){
min=left;
}else{
min=i;
}
if(right !=-1 && heap->Array[min]>heap->Array[right]){
min=right;
}
if(min!=i){
int tmpData=heap->Array[min];
heap->Array[min]=heap->Array[i];
heap->Array[i]=tmpData;
PercolateDown(heap,min);
}
}
VParabola * VParabola::GetLeft (VParabola * p)
{
return GetLeftChild(GetLeftParent(p));
}
bool IsNodeFull(Node* node)
{
return (GetRightChild(node) != NULL && GetLeftChild(node) != NULL );
}
bool IsNodeLeaf(Node* node)
{
return (GetRightChild(node) == NULL && GetLeftChild(node) == NULL);
}