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What is competitive programming?

Competitive programming (CP) is a mind sport where participants solve well-defined algorithmic problems within time and resource constraints. It’s the foundation of the ICPC (International Collegiate Programming Contest) — the oldest and most prestigious programming competition in the world.

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Why competitive programming?

Sharpen your thinking

Develop strong problem-solving and analytical skills that translate to real-world software engineering.

Ace technical interviews

Most tech companies (Google, Meta, Amazon) base their interviews on CP-style problems.

Compete globally

Represent HNU at ICPC regionals and potentially the World Finals.

Build community

Learn alongside motivated peers who share your passion for problem solving.

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Set up your environment

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Choose a language

For competitive programming, we recommend:
LanguageProsRecommendation
C++Fast execution, STL library, most CP resources⭐ Highly recommended
PythonEasy syntax, great for math problemsGood for beginners
JavaBigInteger support, verbose but reliableAcceptable
Most ICPC competitors use C++ because of its speed and the powerful Standard Template Library (STL). We recommend starting with C++ if you’re serious about competing.

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Essential tools

  1. Code editor: VS Code with the C/C++ extension, or CLion
  2. Online judge account: Create accounts on Codeforces, AtCoder, and LeetCode
  3. Compiler: Install g++ (via MinGW on Windows, or build-essential on Linux)

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Your first program

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n;
    cin >> n;
    cout << "Hello, competitive programming! n = " << n << endl;

    return 0;
}
The ios_base::sync_with_stdio(false) and cin.tie(NULL) lines speed up input/output — essential for competitive programming.

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What’s next?

How to practice

Learn effective practice strategies to improve consistently.

Start solving

Begin with our curated beginner problem sheet.