Added avl height benchmark

Lab2/avl/avl.cpp

@@ -0,0 +1,86 @@
+#include "avl.h"
+#include "algorithm"
+
+int getHeight(AVL_tree *root) {
+  if (!root)
+    return 0;
+  return root->height;
+}
+
+AVL_tree *rightRotate(AVL_tree *y) {
+  AVL_tree *x = y->left;
+  AVL_tree *T2 = x->right;
+
+  x->right = y;
+  y->left = T2;
+
+  y->height = 1 + std::max(getHeight(y->left), getHeight(y->right));
+  x->height = 1 + std::max(getHeight(x->left), getHeight(x->right));
+
+  return x;
+}
+
+AVL_tree *leftRotate(AVL_tree *x) {
+  AVL_tree *y = x->right;
+  AVL_tree *T2 = y->left;
+
+  y->left = x;
+  x->right = T2;
+
+  x->height = 1 + std::max(getHeight(x->left), getHeight(x->right));
+  y->height = 1 + std::max(getHeight(y->left), getHeight(y->right));
+
+  return y;
+}
+
+int getBalance(AVL_tree *root) {
+  if (!root)
+    return 0;
+  return getHeight(root->left) - getHeight(root->right);
+}
+
+AVL_tree *insertAVL(AVL_tree *root, int value) {
+  if (root == nullptr) {
+    return new AVL_tree{value, nullptr, nullptr, 1};
+  }
+
+  if (value < root->info) {
+    root->left = insertAVL(root->left, value);
+  } else if (value > root->info) {
+    root->right = insertAVL(root->right, value);
+  } else {
+    return root;
+  }
+
+  root->height = 1 + std::max(getHeight(root->left), getHeight(root->right));
+
+  int balance = getBalance(root);
+
+  if (balance > 1 && value < root->left->info) {
+    return rightRotate(root);
+  }
+
+  if (balance < -1 && value > root->right->info) {
+    return leftRotate(root);
+  }
+
+  if (balance > 1 && value > root->left->info) {
+    root->left = leftRotate(root->left);
+    return rightRotate(root);
+  }
+
+  if (balance < -1 && value < root->right->info) {
+    root->right = rightRotate(root->right);
+    return leftRotate(root);
+  }
+
+  return root;
+}
+
+void deleteAVL(AVL_tree *root){
+    if (root != nullptr) {
+      deleteAVL(root->left);
+      deleteAVL(root->right);
+      delete root;
+    }
+}