Problem Solving and Competitive Programming: Where to Begin

Competitive Programming (CP) is growing more popular by the day among young programmers in Bangladesh. But for lack of proper guidance, many give up halfway. This article offers a clear roadmap.

What is Competitive Programming?

It is a discipline where you solve programming problems within a set time using algorithms and logic. The goal — the correct answer, in less time, with efficient code.

Why do CP?

• It dramatically improves your problem-solving skills and logical thinking.
• It is directly useful in the coding interviews of big companies, including Google and Meta.
• It creates the opportunity to take part in international competitions like the ICPC.

The real reward of CP is not just the ranking — it permanently changes the way you think.

A preparation roadmap

1. Master one language well — most competitive programmers use C++ for its speed.
2. Strengthen the fundamentals — loops, arrays, strings, functions.
3. Start understanding time and space complexity (Big-O).
4. Begin with easy problems and gradually move to harder ones.
5. Take part in at least one online contest every week.

Which topics to learn first

• Sorting and Searching (especially Binary Search)
• Two Pointer and Prefix Sum techniques
• Recursion and basic Dynamic Programming
• Graphs — BFS and DFS
• The basics of Number Theory

A simple example

Finding the largest number in an array — one of the most basic tasks in CP:

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

int main() {
    int n;
    cin >> n;
    int largest = INT_MIN;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        largest = max(largest, x);
    }
    cout << "Maximum: " << largest << endl;
    return 0;
}

Platforms to practice on

• Codeforces — regular contests and a huge problem archive.
• CodeChef and AtCoder — friendly for beginners.
• LeetCode — excellent for interview preparation.

Final words

In Competitive Programming, patience is the greatest virtue. Many problems will feel hard at first, but do not give up. Try to solve at least two problems every day. DCCPS regularly organizes programming contests and practice sessions — take part in them and move forward with the community.