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c_cpp
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Stack -
// Stack implementation in C
#include <stdio.h>
#include <stdlib.h>
#define MAX 10
int count = 0;
// Creating a stack
struct stack {
int items[MAX];
int top;
};
typedef struct stack st;
void createEmptyStack(st *s) {
s->top = -1;
}
// Check if the stack is full
int isfull(st *s) {
if (s->top == MAX - 1)
return 1;
else
return 0;
}
// Check if the stack is empty
int isempty(st *s) {
if (s->top == -1)
return 1;
else
return 0;
}
// Add elements into stack
void push(st *s, int newitem) {
if (isfull(s)) {
printf("STACK FULL");
} else {
s->top++;
s->items[s->top] = newitem;
}
count++;
}
// Remove element from stack
void pop(st *s) {
if (isempty(s)) {
printf("\n STACK EMPTY \n");
} else {
printf("Item popped= %d", s->items[s->top]);
s->top--;
}
count--;
printf("\n");
}
// Print elements of stack
void printStack(st *s) {
printf("Stack: ");
for (int i = 0; i < count; i++) {
printf("%d ", s->items[i]);
}
printf("\n");
}
// Driver code
int main() {
int ch;
st *s = (st *)malloc(sizeof(st));
createEmptyStack(s);
push(s, 1);
push(s, 2);
push(s, 3);
push(s, 4);
printStack(s);
pop(s);
printf("\nAfter popping out\n");
printStack(s);
}
------------------------------------------------------------------------------------------------------------------------------
Queue -
// Queue implementation in C
#include <stdio.h>
#define SIZE 5
void enQueue(int);
void deQueue();
void display();
int items[SIZE], front = -1, rear = -1;
int main() {
//deQueue is not possible on empty queue
deQueue();
//enQueue 5 elements
enQueue(1);
enQueue(2);
enQueue(3);
enQueue(4);
enQueue(5);
// 6th element can't be added to because the queue is full
enQueue(6);
display();
//deQueue removes element entered first i.e. 1
deQueue();
//Now we have just 4 elements
display();
return 0;
}
void enQueue(int value) {
if (rear == SIZE - 1)
printf("\nQueue is Full!!");
else {
if (front == -1)
front = 0;
rear++;
items[rear] = value;
printf("\nInserted -> %d", value);
}
}
void deQueue() {
if (front == -1)
printf("\nQueue is Empty!!");
else {
printf("\nDeleted : %d", items[front]);
front++;
if (front > rear)
front = rear = -1;
}
}
// Function to print the queue
void display() {
if (rear == -1)
printf("\nQueue is Empty!!!");
else {
int i;
printf("\nQueue elements are:\n");
for (i = front; i <= rear; i++)
printf("%d ", items[i]);
}
printf("\n");
}
------------------------------------------------------------------------------------------------------------------------------
Singly Linked List -
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void insertAtBeginning(int);
void insertAtEnd(int);
void insertBetween(int,int,int);
void display();
void removeBeginning();
void removeEnd();
void removeSpecific(int);
struct Node
{
int data;
struct Node *next;
}*head = NULL;
void main()
{
int choice,value,choice1,loc1,loc2;
clrscr();
while(1){
mainMenu: printf("\n\n****** MENU ******\n1. Insert\n2. Display\n3. Delete\n4. Exit\nEnter your choice: ");
scanf("%d",&choice);
switch(choice)
{
case 1: printf("Enter the value to be insert: ");
scanf("%d",&value);
while(1){
printf("Where you want to insert: \n1. At Beginning\n2. At End\n3. Between\nEnter your choice: ");
scanf("%d",&choice1);
switch(choice1)
{
case 1: insertAtBeginning(value);
break;
case 2: insertAtEnd(value);
break;
case 3: printf("Enter the two values where you wanto insert: ");
scanf("%d%d",&loc1,&loc2);
insertBetween(value,loc1,loc2);
break;
default: printf("\nWrong Input!! Try again!!!\n\n");
goto mainMenu;
}
goto subMenuEnd;
}
subMenuEnd:
break;
case 2: display();
break;
case 3: printf("How do you want to Delete: \n1. From Beginning\n2. From End\n3. Spesific\nEnter your choice: ");
scanf("%d",&choice1);
switch(choice1)
{
case 1: removeBeginning();
break;
case 2: removeEnd();
break;
case 3: printf("Enter the value which you wanto delete: ");
scanf("%d",&loc2);
removeSpecific(loc2);
break;
default: printf("\nWrong Input!! Try again!!!\n\n");
goto mainMenu;
}
break;
case 4: exit(0);
default: printf("\nWrong input!!! Try again!!\n\n");
}
}
}
void insertAtBeginning(int value)
{
struct Node *newNode;
newNode = (struct Node*)malloc(sizeof(struct Node));
newNode->data = value;
if(head == NULL)
{
newNode->next = NULL;
head = newNode;
}
else
{
newNode->next = head;
head = newNode;
}
printf("\nOne node inserted!!!\n");
}
void insertAtEnd(int value)
{
struct Node *newNode;
newNode = (struct Node*)malloc(sizeof(struct Node));
newNode->data = value;
newNode->next = NULL;
if(head == NULL)
head = newNode;
else
{
struct Node *temp = head;
while(temp->next != NULL)
temp = temp->next;
temp->next = newNode;
}
printf("\nOne node inserted!!!\n");
}
void insertBetween(int value, int loc1, int loc2)
{
struct Node *newNode;
newNode = (struct Node*)malloc(sizeof(struct Node));
newNode->data = value;
if(head == NULL)
{
newNode->next = NULL;
head = newNode;
}
else
{
struct Node *temp = head;
while(temp->data != loc1 && temp->data != loc2)
temp = temp->next;
newNode->next = temp->next;
temp->next = newNode;
}
printf("\nOne node inserted!!!\n");
}
void removeBeginning()
{
if(head == NULL)
printf("\n\nList is Empty!!!");
else
{
struct Node *temp = head;
if(head->next == NULL)
{
head = NULL;
free(temp);
}
else
{
head = temp->next;
free(temp);
printf("\nOne node deleted!!!\n\n");
}
}
}
void removeEnd()
{
if(head == NULL)
{
printf("\nList is Empty!!!\n");
}
else
{
struct Node *temp1 = head,*temp2;
if(head->next == NULL)
head = NULL;
else
{
while(temp1->next != NULL)
{
temp2 = temp1;
temp1 = temp1->next;
}
temp2->next = NULL;
}
free(temp1);
printf("\nOne node deleted!!!\n\n");
}
}
void removeSpecific(int delValue)
{
struct Node *temp1 = head, *temp2;
while(temp1->data != delValue)
{
if(temp1 -> next == NULL){
printf("\nGiven node not found in the list!!!");
goto functionEnd;
}
temp2 = temp1;
temp1 = temp1 -> next;
}
temp2 -> next = temp1 -> next;
free(temp1);
printf("\nOne node deleted!!!\n\n");
functionEnd:
}
void display()
{
if(head == NULL)
{
printf("\nList is Empty\n");
}
else
{
struct Node *temp = head;
printf("\n\nList elements are - \n");
while(temp->next != NULL)
{
printf("%d --->",temp->data);
temp = temp->next;
}
printf("%d --->NULL",temp->data);
}
}
------------------------------------------------------------------------------------------------------------------------------
Doubly Linked List -
#include<stdio.h>
#include<conio.h>
void insertAtBeginning(int);
void insertAtEnd(int);
void insertAtAfter(int,int);
void deleteBeginning();
void deleteEnd();
void deleteSpecific(int);
void display();
struct Node
{
int data;
struct Node *previous, *next;
}*head = NULL;
void main()
{
int choice1, choice2, value, location;
clrscr();
while(1)
{
printf("\n*********** MENU *************\n");
printf("1. Insert\n2. Delete\n3. Display\n4. Exit\nEnter your choice: ");
scanf("%d",&choice1);
switch()
{
case 1: printf("Enter the value to be inserted: ");
scanf("%d",&value);
while(1)
{
printf("\nSelect from the following Inserting options\n");
printf("1. At Beginning\n2. At End\n3. After a Node\n4. Cancel\nEnter your choice: ");
scanf("%d",&choice2);
switch(choice2)
{
case 1: insertAtBeginning(value);
break;
case 2: insertAtEnd(value);
break;
case 3: printf("Enter the location after which you want to insert: ");
scanf("%d",&location);
insertAfter(value,location);
break;
case 4: goto EndSwitch;
default: printf("\nPlease select correct Inserting option!!!\n");
}
}
case 2: while(1)
{
printf("\nSelect from the following Deleting options\n");
printf("1. At Beginning\n2. At End\n3. Specific Node\n4. Cancel\nEnter your choice: ");
scanf("%d",&choice2);
switch(choice2)
{
case 1: deleteBeginning();
break;
case 2: deleteEnd();
break;
case 3: printf("Enter the Node value to be deleted: ");
scanf("%d",&location);
deleteSpecic(location);
break;
case 4: goto EndSwitch;
default: printf("\nPlease select correct Deleting option!!!\n");
}
}
EndSwitch: break;
case 3: display();
break;
case 4: exit(0);
default: printf("\nPlease select correct option!!!");
}
}
}
void insertAtBeginning(int value)
{
struct Node *newNode;
newNode = (struct Node*)malloc(sizeof(struct Node));
newNode -> data = value;
newNode -> previous = NULL;
if(head == NULL)
{
newNode -> next = NULL;
head = newNode;
}
else
{
newNode -> next = head;
head = newNode;
}
printf("\nInsertion success!!!");
}
void insertAtEnd(int value)
{
struct Node *newNode;
newNode = (struct Node*)malloc(sizeof(struct Node));
newNode -> data = value;
newNode -> next = NULL;
if(head == NULL)
{
newNode -> previous = NULL;
head = newNode;
}
else
{
struct Node *temp = head;
while(temp -> next != NULL)
temp = temp -> next;
temp -> next = newNode;
newNode -> previous = temp;
}
printf("\nInsertion success!!!");
}
void insertAfter(int value, int location)
{
struct Node *newNode;
newNode = (struct Node*)malloc(sizeof(struct Node));
newNode -> data = value;
if(head == NULL)
{
newNode -> previous = newNode -> next = NULL;
head = newNode;
}
else
{
struct Node *temp1 = head, temp2;
while(temp1 -> data != location)
{
if(temp1 -> next == NULL)
{
printf("Given node is not found in the list!!!");
goto EndFunction;
}
else
{
temp1 = temp1 -> next;
}
}
temp2 = temp1 -> next;
temp1 -> next = newNode;
newNode -> previous = temp1;
newNode -> next = temp2;
temp2 -> previous = newNode;
printf("\nInsertion success!!!");
}
EndFunction:
}
void deleteBeginning()
{
if(head == NULL)
printf("List is Empty!!! Deletion not possible!!!");
else
{
struct Node *temp = head;
if(temp -> previous == temp -> next)
{
head = NULL;
free(temp);
}
else{
head = temp -> next;
head -> previous = NULL;
free(temp);
}
printf("\nDeletion success!!!");
}
}
void deleteEnd()
{
if(head == NULL)
printf("List is Empty!!! Deletion not possible!!!");
else
{
struct Node *temp = head;
if(temp -> previous == temp -> next)
{
head = NULL;
free(temp);
}
else{
while(temp -> next != NULL)
temp = temp -> next;
temp -> previous -> next = NULL;
free(temp);
}
printf("\nDeletion success!!!");
}
}
void deleteSpecific(int delValue)
{
if(head == NULL)
printf("List is Empty!!! Deletion not possible!!!");
else
{
struct Node *temp = head;
while(temp -> data != delValue)
{
if(temp -> next == NULL)
{
printf("\nGiven node is not found in the list!!!");
goto FuctionEnd;
}
else
{
temp = temp -> next;
}
}
if(temp == head)
{
head = NULL;
free(temp);
}
else
{
temp -> previous -> next = temp -> next;
free(temp);
}
printf("\nDeletion success!!!");
}
FuctionEnd:
}
void display()
{
if(head == NULL)
printf("\nList is Empty!!!");
else
{
struct Node *temp = head;
printf("\nList elements are: \n");
printf("NULL <--- ");
while(temp -> next != NULL)
{
printf("%d <===> ",temp -> data);
}
printf("%d ---> NULL", temp -> data);
}
}
------------------------------------------------------------------------------------------------------------------------------
Binary Tree -
// Tree traversal in C
#include <stdio.h>
#include <stdlib.h>
struct node {
int item;
struct node* left;
struct node* right;
};
// Inorder traversal
void inorderTraversal(struct node* root) {
if (root == NULL) return;
inorderTraversal(root->left);
printf("%d ->", root->item);
inorderTraversal(root->right);
}
// Preorder traversal
void preorderTraversal(struct node* root) {
if (root == NULL) return;
printf("%d ->", root->item);
preorderTraversal(root->left);
preorderTraversal(root->right);
}
// Postorder traversal
void postorderTraversal(struct node* root) {
if (root == NULL) return;
postorderTraversal(root->left);
postorderTraversal(root->right);
printf("%d ->", root->item);
}
// Create a new Node
struct node* createNode(value) {
struct node* newNode = malloc(sizeof(struct node));
newNode->item = value;
newNode->left = NULL;
newNode->right = NULL;
return newNode;
}
// Insert on the left of the node
struct node* insertLeft(struct node* root, int value) {
root->left = createNode(value);
return root->left;
}
// Insert on the right of the node
struct node* insertRight(struct node* root, int value) {
root->right = createNode(value);
return root->right;
}
int main() {
struct node* root = createNode(1);
insertLeft(root, 2);
insertRight(root, 3);
insertLeft(root->left, 4);
printf("Inorder traversal \n");
inorderTraversal(root);
printf("\nPreorder traversal \n");
preorderTraversal(root);
printf("\nPostorder traversal \n");
postorderTraversal(root);
}
------------------------------------------------------------------------------------------------------------------------------
Binary Search Tree -
// Binary Search Tree operations in C
#include <stdio.h>
#include <stdlib.h>
struct node {
int key;
struct node *left, *right;
};
// Create a node
struct node *newNode(int item) {
struct node *temp = (struct node *)malloc(sizeof(struct node));
temp->key = item;
temp->left = temp->right = NULL;
return temp;
}
// Inorder Traversal
void inorder(struct node *root) {
if (root != NULL) {
// Traverse left
inorder(root->left);
// Traverse root
printf("%d -> ", root->key);
// Traverse right
inorder(root->right);
}
}
// Insert a node
struct node *insert(struct node *node, int key) {
// Return a new node if the tree is empty
if (node == NULL) return newNode(key);
// Traverse to the right place and insert the node
if (key < node->key)
node->left = insert(node->left, key);
else
node->right = insert(node->right, key);
return node;
}
// Find the inorder successor
struct node *minValueNode(struct node *node) {
struct node *current = node;
// Find the leftmost leaf
while (current && current->left != NULL)
current = current->left;
return current;
}
// Deleting a node
struct node *deleteNode(struct node *root, int key) {
// Return if the tree is empty
if (root == NULL) return root;
// Find the node to be deleted
if (key < root->key)
root->left = deleteNode(root->left, key);
else if (key > root->key)
root->right = deleteNode(root->right, key);
else {
// If the node is with only one child or no child
if (root->left == NULL) {
struct node *temp = root->right;
free(root);
return temp;
} else if (root->right == NULL) {
struct node *temp = root->left;
free(root);
return temp;
}
// If the node has two children
struct node *temp = minValueNode(root->right);
// Place the inorder successor in position of the node to be deleted
root->key = temp->key;
// Delete the inorder successor
root->right = deleteNode(root->right, temp->key);
}
return root;
}
// Driver code
int main() {
struct node *root = NULL;
root = insert(root, 8);
root = insert(root, 3);
root = insert(root, 1);
root = insert(root, 6);
root = insert(root, 7);
root = insert(root, 10);
root = insert(root, 14);
root = insert(root, 4);
printf("Inorder traversal: ");
inorder(root);
printf("\nAfter deleting 10\n");
root = deleteNode(root, 10);
printf("Inorder traversal: ");
inorder(root);
}
------------------------------------------------------------------------------------------------------------------------------
DFS -
// DFS algorithm in C
#include <stdio.h>
#include <stdlib.h>
struct node {
int vertex;
struct node* next;
};
struct node* createNode(int v);
struct Graph {
int numVertices;
int* visited;
// We need int** to store a two dimensional array.
// Similary, we need struct node** to store an array of Linked lists
struct node** adjLists;
};
// DFS algo
void DFS(struct Graph* graph, int vertex) {
struct node* adjList = graph->adjLists[vertex];
struct node* temp = adjList;
graph->visited[vertex] = 1;
printf("Visited %d \n", vertex);
while (temp != NULL) {
int connectedVertex = temp->vertex;
if (graph->visited[connectedVertex] == 0) {
DFS(graph, connectedVertex);
}
temp = temp->next;
}
}
// Create a node
struct node* createNode(int v) {
struct node* newNode = malloc(sizeof(struct node));
newNode->vertex = v;
newNode->next = NULL;
return newNode;
}
// Create graph
struct Graph* createGraph(int vertices) {
struct Graph* graph = malloc(sizeof(struct Graph));
graph->numVertices = vertices;
graph->adjLists = malloc(vertices * sizeof(struct node*));
graph->visited = malloc(vertices * sizeof(int));
int i;
for (i = 0; i < vertices; i++) {
graph->adjLists[i] = NULL;
graph->visited[i] = 0;
}
return graph;
}
// Add edge
void addEdge(struct Graph* graph, int src, int dest) {
// Add edge from src to dest
struct node* newNode = createNode(dest);
newNode->next = graph->adjLists[src];
graph->adjLists[src] = newNode;
// Add edge from dest to src
newNode = createNode(src);
newNode->next = graph->adjLists[dest];
graph->adjLists[dest] = newNode;
}
// Print the graph
void printGraph(struct Graph* graph) {
int v;
for (v = 0; v < graph->numVertices; v++) {
struct node* temp = graph->adjLists[v];
printf("\n Adjacency list of vertex %d\n ", v);
while (temp) {
printf("%d -> ", temp->vertex);
temp = temp->next;
}
printf("\n");
}
}
int main() {
struct Graph* graph = createGraph(4);
addEdge(graph, 0, 1);
addEdge(graph, 0, 2);
addEdge(graph, 1, 2);
addEdge(graph, 2, 3);
printGraph(graph);
DFS(graph, 2);
return 0;
}
------------------------------------------------------------------------------------------------------------------------------
AVL Tree -
// AVL tree implementation in C
#include <stdio.h>
#include <stdlib.h>
// Create Node
struct Node {
int key;
struct Node *left;
struct Node *right;
int height;
};
int max(int a, int b);
// Calculate height
int height(struct Node *N) {
if (N == NULL)
return 0;
return N->height;
}
int max(int a, int b) {
return (a > b) ? a : b;
}
// Create a node
struct Node *newNode(int key) {
struct Node *node = (struct Node *)
malloc(sizeof(struct Node));
node->key = key;
node->left = NULL;
node->right = NULL;
node->height = 1;
return (node);
}
// Right rotate
struct Node *rightRotate(struct Node *y) {
struct Node *x = y->left;
struct Node *T2 = x->right;
x->right = y;
y->left = T2;
y->height = max(height(y->left), height(y->right)) + 1;
x->height = max(height(x->left), height(x->right)) + 1;
return x;
}
// Left rotate
struct Node *leftRotate(struct Node *x) {
struct Node *y = x->right;
struct Node *T2 = y->left;
y->left = x;
x->right = T2;
x->height = max(height(x->left), height(x->right)) + 1;
y->height = max(height(y->left), height(y->right)) + 1;
return y;
}
// Get the balance factor
int getBalance(struct Node *N) {
if (N == NULL)
return 0;
return height(N->left) - height(N->right);
}
// Insert node
struct Node *insertNode(struct Node *node, int key) {
// Find the correct position to insertNode the node and insertNode it
if (node == NULL)
return (newNode(key));
if (key < node->key)
node->left = insertNode(node->left, key);
else if (key > node->key)
node->right = insertNode(node->right, key);
else
return node;
// Update the balance factor of each node and
// Balance the tree
node->height = 1 + max(height(node->left),
height(node->right));
int balance = getBalance(node);
if (balance > 1 && key < node->left->key)
return rightRotate(node);
if (balance < -1 && key > node->right->key)
return leftRotate(node);
if (balance > 1 && key > node->left->key) {
node->left = leftRotate(node->left);
return rightRotate(node);
}
if (balance < -1 && key < node->right->key) {
node->right = rightRotate(node->right);
return leftRotate(node);
}
return node;
}
struct Node *minValueNode(struct Node *node) {
struct Node *current = node;
while (current->left != NULL)
current = current->left;
return current;
}
// Delete a nodes
struct Node *deleteNode(struct Node *root, int key) {
// Find the node and delete it
if (root == NULL)
return root;
if (key < root->key)
root->left = deleteNode(root->left, key);
else if (key > root->key)
root->right = deleteNode(root->right, key);
else {
if ((root->left == NULL) || (root->right == NULL)) {
struct Node *temp = root->left ? root->left : root->right;
if (temp == NULL) {
temp = root;
root = NULL;
} else
*root = *temp;
free(temp);
} else {
struct Node *temp = minValueNode(root->right);
root->key = temp->key;
root->right = deleteNode(root->right, temp->key);
}
}
if (root == NULL)
return root;
// Update the balance factor of each node and
// balance the tree
root->height = 1 + max(height(root->left),
height(root->right));
int balance = getBalance(root);
if (balance > 1 && getBalance(root->left) >= 0)
return rightRotate(root);
if (balance > 1 && getBalance(root->left) < 0) {
root->left = leftRotate(root->left);
return rightRotate(root);
}
if (balance < -1 && getBalance(root->right) <= 0)
return leftRotate(root);
if (balance < -1 && getBalance(root->right) > 0) {
root->right = rightRotate(root->right);
return leftRotate(root);
}
return root;
}
// Print the tree
void printPreOrder(struct Node *root) {
if (root != NULL) {
printf("%d ", root->key);
printPreOrder(root->left);
printPreOrder(root->right);
}
}
int main() {
struct Node *root = NULL;
root = insertNode(root, 2);
root = insertNode(root, 1);
root = insertNode(root, 7);
root = insertNode(root, 4);
root = insertNode(root, 5);
root = insertNode(root, 3);
root = insertNode(root, 8);
printPreOrder(root);
root = deleteNode(root, 3);
printf("\nAfter deletion: ");
printPreOrder(root);
return 0;
}
------------------------------------------------------------------------------------------------------------------------------
Hashing using Linear Probing -
// C program for the above approach
#include <stdio.h>
#include <stdlib.h>
struct HashNode {
int key;
int value;
};
const int capacity = 20;
int size = 0;
struct HashNode** arr;
struct HashNode* dummy;
// Function to add key value pair
void insert(int key, int V)
{
struct HashNode* temp
= (struct HashNode*)malloc(sizeof(struct HashNode));
temp->key = key;
temp->value = V;
// Apply hash function to find
// index for given key
int hashIndex = key % capacity;
// Find next free space
while (arr[hashIndex] != NULL
&& arr[hashIndex]->key != key
&& arr[hashIndex]->key != -1) {
hashIndex++;
hashIndex %= capacity;
}
// If new node to be inserted
// increase the current size
if (arr[hashIndex] == NULL
|| arr[hashIndex]->key == -1)
size++;
arr[hashIndex] = temp;
}
// Function to delete a key value pair
int delete (int key)
{
// Apply hash function to find
// index for given key
int hashIndex = key % capacity;
// Finding the node with given
// key
while (arr[hashIndex] != NULL) {
// if node found
if (arr[hashIndex]->key == key) {
// Insert dummy node here
// for further use
arr[hashIndex] = dummy;
// Reduce size
size--;
// Return the value of the key
return 1;
}
hashIndex++;
hashIndex %= capacity;
}
// If not found return null
return 0;
}
// Function to search the value
// for a given key
int find(int key)
{
// Apply hash function to find
// index for given key
int hashIndex = (key % capacity);
int counter = 0;
// Find the node with given key
while (arr[hashIndex] != NULL) {
int counter = 0;
// If counter is greater than
// capacity
if (counter++ > capacity)
break;
// If node found return its
// value
if (arr[hashIndex]->key == key)
return arr[hashIndex]->value;
hashIndex++;
hashIndex %= capacity;
}
// If not found return
// -1
return -1;
}
// Driver Code
int main()
{
// Space allocation
arr = (struct HashNode**)malloc(sizeof(struct HashNode*)
* capacity);
// Assign NULL initially
for (int i = 0; i < capacity; i++)
arr[i] = NULL;
dummy
= (struct HashNode*)malloc(sizeof(struct HashNode));
dummy->key = -1;
dummy->value = -1;
insert(1, 5);
insert(2, 15);
insert(3, 20);
insert(4, 7);
if (find(4) != -1)
printf("Value of Key 4 = %d\n", find(4));
else
printf("Key 4 does not exists\n");
if (delete (4))
printf("Node value of key 4 is deleted "
"successfully\n");
else {
printf("Key does not exists\n");
}
if (find(4) != -1)
printf("Value of Key 4 = %d\n", find(4));
else
printf("Key 4 does not exists\n");
}
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