🧩 Algorithms & Problem Solving — Level 2

A practical C++ problem-solving journey focused on logic, functions, arrays, patterns, algorithms, and real console applications.

Overview • Problems • Projects • Skills

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📌 Overview

This repository contains 50 C++ problem-solving exercises organized into separate folders, with alternative approaches preserved in separate source files whenever available.

The goal is simple: practice the problem, compare solutions, understand the logic, and build stronger C++ fundamentals.

📊 Repository	Details
🧩 Problems	50
💻 Language	C++
🔁 Alternative solutions	Preserved separately
🎮 External projects	2
📁 Organization	One folder per problem

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🧭 Quick Navigation

Section	Focus	Link
🧩 Problems 01–10	Numbers, digits, frequency, basic logic	Explore
🔢 Problems 11–20	Palindrome, patterns, passwords, random values	Explore
🧮 Problems 21–30	Arrays, random data, copying, aggregation	Explore
🧠 Problems 31–40	Shuffling, searching, dynamic array practice	Explore
📐 Problems 41–50	Array checks and custom math functions	Explore
🎮 Projects	Complete console applications	Explore

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🧩 Problem Roadmap

Every problem has its own folder. ▶ View Code opens the main solution directly.

🔢 Problems 01–10

#	Problem	Main concept	Solutions	🔗
01	Multiplication Table From 1 To 10	Nested loops / formatted output	3	▶ View Code
02	Print Prime Numbers From 1 To N	Prime checking / loops	1	▶ View Code
03	Perfect Number Check	Divisors / summation	2	▶ View Code
04	Print Perfect Numbers From 1 To N	Reusable functions / loops	2	▶ View Code
05	Print Digits In Reverse Order	Digit extraction	1	▶ View Code
06	Sum Of Digits	% 10 / / 10	2	▶ View Code
07	Reverse Number	Number reversal	3	▶ View Code
08	Digit Frequency	Counting digits	1	▶ View Code
09	All Digits Frequency	Frequency counting	1	▶ View Code
10	Reverse Number Then Print Digits	Reversal + traversal	1	▶ View Code

🔢 Problems 11–20

#	Problem	Main concept	Solutions	🔗
11	Palindrome Number	Reversal / comparison	3	▶ View Code
12	Inverted Number Pattern	Nested loops / patterns	1	▶ View Code
13	Inverted Number Pattern With Letters	ASCII / nested loops	1	▶ View Code
14	Inverted Letter Pattern	Character patterns	1	▶ View Code
15	Letter Pattern	ASCII / patterns	1	▶ View Code
16	Print Words From AAA To ZZZ	Nested loops / combinations	2	▶ View Code
17	Password Guessing	Brute force / loops	1	▶ View Code
18	Encrypt And Decrypt Text	String manipulation / ASCII	1	▶ View Code
19	Random Number From 1 To 10	Random number generation	1	▶ View Code
20	Random Character	Random character generation	1	▶ View Code

🧮 Problems 21–30

#	Problem	Main concept	Solutions	🔗
21	Generate Keys	Random generation / strings	2	▶ View Code
22	Count Number Of Occurrences In Array	Array searching / counting	1	▶ View Code
23	Fill Array With Random Numbers	Random arrays	1	▶ View Code
24	Maximum Number In Array	Array traversal	1	▶ View Code
25	Minimum Number In Array	Array traversal	1	▶ View Code
26	Sum Of Array Elements	Accumulation	1	▶ View Code
27	Array Average	Sum / division	1	▶ View Code
28	Copy Array	Array copying	1	▶ View Code
29	Copy Only Prime Numbers	Filtering arrays	1	▶ View Code
30	Sum Of Two Arrays	Parallel array processing	1	▶ View Code

🧠 Problems 31–40

#	Problem	Main concept	Solutions	🔗
31	Shuffle Array	Randomization / swapping	1	▶ View Code
32	Copy Array In Reverse Order	Reverse traversal	1	▶ View Code
33	Generate Keys And Store Them In Array	Strings / arrays	1	▶ View Code
34	Search For Number In Array	Linear search	1	▶ View Code
35	Search For Number — Boolean Check	Boolean helper functions	1	▶ View Code
36	Input User Numbers In Array	User input / arrays	2	▶ View Code
37	Copy Array Using AddArrayElement	Reusable array helper	2	▶ View Code
38	Copy Odd Numbers To A New Array	Filtering / odd numbers	2	▶ View Code
39	Copy Prime Numbers To A New Array	Filtering / prime numbers	2	▶ View Code
40	Copy Distinct Numbers To Array	Duplicate detection	3	▶ View Code

📐 Problems 41–50

#	Problem	Main concept	Solutions	🔗
41	Palindrome Array	Symmetry / array comparison	2	▶ View Code
42	Count Odd Numbers In Array	Filtering / counting	1	▶ View Code
43	Count Even Numbers In Array	Filtering / counting	1	▶ View Code
44	Count Positive Numbers In Array	Conditions / counting	2	▶ View Code
45	Count Negative Numbers In Array	Conditions / counting	1	▶ View Code
46	Custom ABS Function	Functions / math	1	▶ View Code
47	Custom Round Function	Floating-point logic	1	▶ View Code
48	Custom Floor Function	Floating-point logic	1	▶ View Code
49	Custom Ceil Function	Floating-point logic	1	▶ View Code
50	Custom Sqrt Function	Math / pow()	1	▶ View Code

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🎮 Projects

These projects live in their own dedicated GitHub repositories rather than inside this problem-solving repository.

#	Project	Focus	🔗
01	🪨📄✂️ Rock Paper Scissors Game	Game logic, enums, structs, random choices, rounds, result tracking	▶ Open Project
02	🧮 Math Quiz Game	Random questions, difficulty levels, operations, scoring, game flow	▶ Open Project

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🧠 Core Skills

✅ Functions	✅ Loops	✅ Arrays	✅ Strings
✅ Enums	✅ Structs	✅ Random Numbers	✅ ASCII
✅ Searching	✅ Filtering	✅ Array Manipulation	✅ Math Functions

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📁 Repository Structure

Algorithms_and_Problem-Solving_level_2/
│
├── Problem-01-.../
│   ├── My-Solution.cpp
│   └── Doctor-Solution.cpp
│
├── Problem-02-.../
│   └── Solution-01.cpp
│
├── ...
│
├── Problem-50-Custom-Sqrt-Function/
│   └── Solution-01.cpp
│
└── README.md

🔁 Solution Naming

When a problem has more than one approach, the solutions remain separated, for example:

• My-Solution.cpp
• Doctor-Solution.cpp
• Alternative-Solution.cpp
• Solution-01.cpp

This makes it easy to compare approaches without overwriting the original solution.

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🧹 Naming Convention

All organized folders and files use clean - separators instead of spaces or unnecessary special characters. This keeps paths simple for GitHub, terminals, and IDEs.

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🚀 Learning Path

Understand → Solve → Compare → Practice → Refactor

The repository is organized so you can solve each problem yourself first, then open the available alternatives and compare the logic and structure.

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📘 Learn • 💻 Practice • 🧠 Solve • 🚀 Build