#include <iostream>
#include <vector>
#include <algorithm> 
using namespace std;

struct Node {
    int data;
    Node* next;

    Node(int val) : data(val), next(nullptr) {}
};

Node* deleteElements(Node* head, vector<int>& toDelete) {
    Node* dummy = new Node(-1);
    dummy->next = head;
    
    Node* current = dummy;
    
    while (current->next) {
        if (find(toDelete.begin(), toDelete.end(), current->next->data) != toDelete.end()) {
            Node* temp = current->next;
            current->next = current->next->next;
            delete temp;
        } else {
            current = current->next;
        }
    }
    
    head = dummy->next;
    delete dummy;
    
    return head;
}

void reverseAndPrint(Node* head) {
    vector<int> elements;
    while (head) {
        elements.push_back(head->data);
        head = head->next;
    }
    
    for (int i = elements.size() - 1; i >= 0; i--) {
        cout << elements[i] << " ";
    }
    cout << endl;
}

int main() {
    int val;
    vector<int> elements;
    while (cin >> val && val != -1) {
        elements.push_back(val);
    }
    
    Node* head = nullptr;
    for (int i = elements.size() - 1; i >= 0; i--) {
        Node* newNode = new Node(elements[i]);
        newNode->next = head;
        head = newNode;
    }
    
    vector<int> toDelete;
    while (cin >> val && val != -1) {
        toDelete.push_back(val);
    }
    
    head = deleteElements(head, toDelete);
    
    reverseAndPrint(head);
    
    while (head) {
        Node* temp = head;
        head = head->next;
        delete temp;
    }
    
    return 0;
}

//Sushant
by

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}