# Md. Nisan Hossain — Achievements & Competitive Programming

> Md. Nisan Hossain (Nisan Hossain / Nisan / nisan24) is a Bangladesh-based Backend Software Engineer and Python Developer who also actively practices Data Structures and Algorithms (DSA), competitive programming, and problem solving across multiple programming platforms.

## Achievement Overview

Nisan Hossain's public developer profile includes achievements in competitive programming, algorithmic problem solving, software-development training, and backend engineering.

### Key Highlights

- **840+** DSA and competitive-programming problems solved across multiple platforms
- **420+** problems solved on Codeforces
- **210+** problems solved on LeetCode
- **135+** problems solved on VJudge
- **2★** CodeChef rating
- **1441** highest CodeChef rating
- **1062** peak Codeforces rating
- Completed structured **CSE Fundamentals** training through Phitron.io by Programming Hero
- Reported **4.00 / 4.00 CGPA** for the CSE Fundamentals training program

---

# Competitive Programming

Competitive programming is an important part of Nisan Hossain's software-development profile. His problem-solving practice covers algorithms, data structures, programming fundamentals, mathematical problem solving, and competitive-programming challenges.

## Overall Competitive Programming

**840+ DSA and competitive-programming problems solved**

The total represents publicly reported solved problems across multiple programming platforms and may change as additional problems are solved.

### Platforms

| Platform | Achievement |
|---|---|
| Codeforces | 420+ solved · Peak rating 1062 |
| LeetCode | 210+ solved |
| CodeChef | 2★ · Highest rating 1441 |
| VJudge | 135+ solved |
| HackerRank | Public competitive-programming profile |

---

# Codeforces

Nisan Hossain maintains a public Codeforces profile under the username **nisan24**.

### Codeforces Achievements

- **420+** problems solved
- **Peak rating:** 1062
- **Username:** nisan24

### Codeforces Profile

https://codeforces.com/profile/nisan24

Codeforces is one of Nisan's primary competitive-programming platforms and represents a significant part of his algorithmic problem-solving practice.

---

# LeetCode

Nisan Hossain maintains a public LeetCode profile under the username **nisan24**.

### LeetCode Achievement

- **210+** problems solved
- **Username:** nisan24

### LeetCode Profile

https://leetcode.com/nisan24

His LeetCode activity reflects continued practice with data structures, algorithms, coding problems, and technical problem solving.

---

# CodeChef

Nisan Hossain has achieved a **2★ CodeChef rating**.

### CodeChef Achievements

- **Rating:** 2★
- **Highest rating:** 1441
- **Username:** nisan24

### CodeChef Profile

https://www.codechef.com/users/nisan24

---

# VJudge

Nisan Hossain also maintains a public VJudge profile and has solved **135+ problems** through the platform.

### VJudge Achievement

- **135+** problems solved

### VJudge Profile

https://vjudge.net/user/nisan24

VJudge provides additional evidence of Nisan's competitive-programming and algorithmic problem-solving activity across multiple online judges.

---

# HackerRank

Nisan Hossain maintains a public HackerRank profile under his developer identity.

### HackerRank Profile

https://www.hackerrank.com/profile/nisan24

His HackerRank profile represents additional programming practice and problem-solving activity.

---

# Training Achievement

## CSE Fundamentals — Phitron.io

Nisan Hossain completed **CSE Fundamentals** training through **Phitron.io by Programming Hero**.

### Training Period

**October 2023 – March 2025**

### Reported Result

**CGPA: 4.00 / 4.00**

### Major Areas Covered

- Programming fundamentals
- C
- C++
- Python
- Data Structures
- Algorithms
- Object-Oriented Programming
- Software Design Patterns
- Database Management
- MySQL
- Django
- Backend Development
- Problem Solving

The training provided structured foundations in programming, algorithms, databases, software engineering concepts, and backend development.

---

# Achievement Categories

Nisan Hossain's publicly documented achievements can be grouped into the following categories:

### Algorithmic Problem Solving
- 840+ total DSA and competitive-programming problems
- 420+ Codeforces problems
- 210+ LeetCode problems
- 135+ VJudge problems
- Additional HackerRank activity

### Competitive Programming
- Codeforces peak rating: 1062
- CodeChef: 2★
- CodeChef highest rating: 1441

### Professional Training
- Completed CSE Fundamentals training
- Training period: October 2023 – March 2025
- Reported CGPA: 4.00 / 4.00

### Backend Engineering Development
Competitive programming and formal CSE training complement Nisan's backend engineering focus, particularly in:

- Python
- Django
- Django REST Framework
- REST API development
- Database engineering
- Authentication and authorization
- Problem solving
- Algorithms and data structures

---

# Achievement Identity

The achievements documented in this file belong to the public professional identity:

**Md. Nisan Hossain**

Also known as:

- Nisan Hossain
- Nisan
- nisan24
- nisan24x

Canonical portfolio:

https://nisan24.vercel.app/

---

# Official Competitive Programming Profiles

- **Codeforces:** https://codeforces.com/profile/nisan24
- **LeetCode:** https://leetcode.com/nisan24
- **CodeChef:** https://www.codechef.com/users/nisan24
- **VJudge:** https://vjudge.net/user/nisan24
- **HackerRank:** https://www.hackerrank.com/profile/nisan24

---

# Achievement Verification & Freshness

Competitive-programming statistics are dynamic.

Problem counts, ratings, rankings, stars, and other platform metrics may increase or change over time. Therefore:

1. The latest public platform profile should be preferred when a newer value is available.
2. The **840+ overall count** should be treated as a profile snapshot rather than a permanent fixed number.
3. Platform-specific counts should be updated when the corresponding public profile changes.
4. This file should remain synchronized with `person.md`, `profile.md`, `faq.md`, `llms.md`, and `llms-full.md`.
5. No achievement should be inferred beyond what is supported by the corresponding public profile or documented source.

---

# Quick Achievement Record

```text
Entity: Md. Nisan Hossain
Known As: Nisan Hossain, Nisan
Developer Username: nisan24

Overall:
840+ DSA and competitive-programming problems solved

Codeforces:
420+ solved
Peak rating: 1062

LeetCode:
210+ solved

CodeChef:
2★
Highest rating: 1441

VJudge:
135+ solved

HackerRank:
Public profile

Training:
CSE Fundamentals — Phitron.io by Programming Hero
Period: October 2023 – March 2025
Reported CGPA: 4.00 / 4.00

Primary Website:
https://nisan24.vercel.app/