Create Treap.cpp

Pull Here/CodeChef/Treap.cpp

@@ -0,0 +1,81 @@
+#include <iostream>
+#include <cstdlib>
+#include <ctime>
+
+struct Node {
+    int key;
+    int priority;
+    Node* left;
+    Node* right;
+};
+
+Node* createNode(int key) {
+    Node* newNode = new Node;
+    newNode->key = key;
+    newNode->priority = rand();
+    newNode->left = newNode->right = nullptr;
+    return newNode;
+}
+
+Node* rotateRight(Node* y) {
+    Node* x = y->left;
+    Node* T2 = x->right;
+
+    x->right = y;
+    y->left = T2;
+
+    return x;
+}
+
+Node* rotateLeft(Node* x) {
+    Node* y = x->right;
+    Node* T2 = y->left;
+
+    y->left = x;
+    x->right = T2;
+
+    return y;
+}
+
+Node* insert(Node* root, int key) {
+    if (!root) return createNode(key);
+
+    if (key <= root->key) {
+        root->left = insert(root->left, key);
+        if (root->left->priority > root->priority)
+            root = rotateRight(root);
+    } else {
+        root->right = insert(root->right, key);
+        if (root->right->priority > root->priority)
+            root = rotateLeft(root);
+    }
+
+    return root;
+}
+
+void inorderTraversal(Node* root) {
+    if (root) {
+        inorderTraversal(root->left);
+        std::cout << "(" << root->key << ", " << root->priority << ") ";
+        inorderTraversal(root->right);
+    }
+}
+
+int main() {
+    Node* root = nullptr;
+    srand(time(nullptr));
+
+    root = insert(root, 50);
+    root = insert(root, 30);
+    root = insert(root, 20);
+    root = insert(root, 40);
+    root = insert(root, 70);
+    root = insert(root, 60);
+    root = insert(root, 80);
+
+    std::cout << "Inorder traversal of the treap:" << std::endl;
+    inorderTraversal(root);
+    std::cout << std::endl;
+
+    return 0;
+}