Update README.md

Author: gucci1909

README.md

@@ -7,22 +7,22 @@ Welcome to my C++ learning repository! This is a curated collection of concepts,
 The repository is organized into the following folders:
 
 1. **Basics**  
-   Covers the foundational concepts such as data types, operators, control structures, and functions.  
+   It covers the foundational concepts such as data types, operators, control structures, and functions.  
 
 2. **Object-Oriented Programming (OOP)**  
    Dive into classes, objects, inheritance, polymorphism, encapsulation, and abstraction.
 
 3. **Advanced Concepts**  
-   Topics like pointers, memory management, file handling, templates, and lambda functions.  
+   Topics like pointers, memory management, file handling, templates, and friend functions.  
 
 4. **Data Structures**  
-   Implementations of arrays, linked lists, stacks, queues, trees, and graphs.
+   Implementations of arrays, linked lists, stacks, and queues.
 
 5. **Standard Template Library (STL)**  
    Comprehensive examples and use cases of STL components like:  
    - Containers: `vector`, `map`, `set`, `deque`, etc.  
    - Iterators and Algorithms: `sort`, `binary_search`, etc.  
-   - Utilities: `pair`, `tuple`, etc.  
+   - Utilities: `pair`, etc.  
 
 6. **Problem-Solving**  
    Real-world problems and their solutions using C++ and STL.