Why is my Ranked Binary search tree implementation is so slow? - c++

Question

So I wrote a Ranked self-balancing Binary Search Tree instead of using std::set. I was expecting it to work faster for getting rank of elements, but it seems to take more time than using std::set and iterating through to find rank. Is there any way to speed it up?
#include<bits/stdc++.h>
struct treeNode{
int data;
int leftsize; //for finding rank
int height; //for balancing during insertions and deletions
treeNode* left;
treeNode* right;
treeNode()
:data(NAN), leftsize(0), left(nullptr), right(nullptr){}
treeNode(int val, int lsize, int ht)
:data(val), leftsize(lsize), height(ht), left(nullptr), right(nullptr){}
};
int height(treeNode* node)
{
if(node == nullptr)
return 0;
return node->height;
}
int getBalance(treeNode* node)
{
if(node==nullptr)
return 0;
return height(node->left) - height(node->right);
}
int parseLeftSub(treeNode* node)
{
if(node == nullptr)
return 0;
int cnt = 1;
cnt += parseLeftSub(node->left);
cnt += parseLeftSub(node->right);
return cnt;
}
void printNode(treeNode* node)
{
if(node == nullptr)
return;
printNode(node->left);
std::cout << node->data << " " << node->leftsize << std::endl;
printNode(node->right);
}
treeNode* createNode(int val)
{
treeNode* node = new treeNode(val, 1, 1);
return node;
}
treeNode* createTree(std::vector<int>& a, int start, int end)
{
if(start>end)
return nullptr;
int mid = (start + end)/2;
treeNode* node = createNode(a[mid]);
node->left = createTree(a, start, mid-1);
node->right = createTree(a, mid+1, end);
node->leftsize += parseLeftSub(node->left);
return node;
}
treeNode* rightRotate(treeNode* y)
{
treeNode* x = y->left;
treeNode* T2 = x->right;
// Perform rotation
x->right = y;
y->left = T2;
// Update heights
y->height = std::max(height(y->left),
height(y->right)) + 1;
x->height = std::max(height(x->left),
height(x->right)) + 1;
// Return new root
y->leftsize = parseLeftSub(y->left) + 1;
return x;
}
treeNode* leftRotate(treeNode* x)
{
treeNode* y = x->right;
treeNode* T2 = y->left;
// Perform rotation
y->left = x;
x->right = T2;
// Update heights
x->height = std::max(height(x->left),
height(x->right)) + 1;
y->height = std::max(height(y->left),
height(y->right)) + 1;
// Return new root
y->leftsize = parseLeftSub(y->left) + 1;
return y;
}
treeNode* insertNode(int val, treeNode* node)
{
if(node == nullptr)
return createNode(val);
if(val < node->data)
node->left = insertNode(val, node->left);
else if(val > node->data)
node->right = insertNode(val, node->right);
else
return node;
node->height = 1 + std::max(height(node->left), height(node->right));
node->leftsize = parseLeftSub(node->left) + 1;
int balance = getBalance(node);
if(balance > 1 && val < node->left->data)
return rightRotate(node);
else if(balance < -1 && val > node->right->data)
return leftRotate(node);
else if(balance > 1 && val > node->left->data)
{
node->left = leftRotate(node->left);
return rightRotate(node);
}
else if(balance < -1 && val < node->right->data)
{
node->right = rightRotate(node->right);
return leftRotate(node);
}
return node;
}
treeNode* searchNode(int val, treeNode* node)
{
if(node == nullptr)
return nullptr;
treeNode* foundNode = nullptr;
if(val == node->data)
return node;
else if(val < node->data)
foundNode = searchNode(val, node->left);
else
foundNode = searchNode(val, node->right);
return foundNode;
}
treeNode* findLowerBound(int val, treeNode* node)
{
if(node == nullptr)
return nullptr;
if(val == node->data)
return node;
else if(val>node->data)
{
return(findLowerBound(val, node->right));
}
treeNode* temp = findLowerBound(val, node->left);
if(temp != nullptr && temp->data >= val)
return temp;
else
return node;
}
treeNode* findUpperBound(int val, treeNode* node)
{
if(node == nullptr)
return nullptr;
if(val == node->data)
return node;
else if(val<node->data)
{
return(findUpperBound(val, node->left));
}
treeNode* temp = findUpperBound(val, node->right);
if(temp != nullptr && temp->data <= val)
return temp;
else
return node;
}
treeNode* findMinNode(treeNode* node)
{
if(node->left == nullptr)
return node;
return (findMinNode(node->left));
}
treeNode* deleteNode(int val, treeNode*& node)
{
if(node == nullptr)
return nullptr;
if(node->data > val)
node->left = deleteNode(val, node->left);
else if(node->data < val)
node->right = deleteNode(val, node->right);
else
{
if(node->left==nullptr && node->right==nullptr)
{
delete node;
node = nullptr;
}
else if(node->left==nullptr)
{
treeNode* temp = node;
node = node->right;
delete temp;
}
else if(node->right==nullptr)
{
treeNode* temp = node;
node = node->left;
delete temp;
}
else
{
treeNode* temp = findMinNode(node->right);
node->data = temp->data;
node->right = deleteNode(temp->data, node->right);
}
}
if (node == NULL)
return node;
node->leftsize = parseLeftSub(node->left) + 1;
node->height = 1 + std::max(height(node->left),
height(node->right));
int balance = getBalance(node);
if (balance > 1 &&
getBalance(node->left) >= 0)
return rightRotate(node);
if (balance > 1 &&
getBalance(node->left) < 0)
{
node->left = leftRotate(node->left);
return rightRotate(node);
}
if (balance < -1 &&
getBalance(node->right) <= 0)
return leftRotate(node);
if (balance < -1 &&
getBalance(node->right) > 0)
{
node->right = rightRotate(node->right);
return leftRotate(node);
}
return node;
}
int findRank(int val, treeNode* node)
{
int rank = node->leftsize;
if(node==nullptr)
{
return -1;
}
if(val<node->data)
{
rank -= node->leftsize;
rank += findRank(val, node->left);
}
else if(val>node->data)
{
rank += findRank(val, node->right);
}
return rank;
}
I know its quite a lot. Also can any other stl containers be used to find rank, insert and delete efficiently