Hello Codeforces!
If you are completely new to Competitive Programming, starting can feel confusing.
You see thousands of problems, unfamiliar algorithms, and people solving problems much faster than you. Sometimes even an easy problem can feel impossible.
So, where should you start?
Here is a simple roadmap that I think can help beginners.
1. Learn One Programming Language
First, choose one programming language and become comfortable with it.
For Competitive Programming, C++ is a popular choice because of its speed and STL.
You don't need to learn everything about C++ at first.
Focus on:
- Variables and data types
- Input / Output
- Conditions
- Loops
- Functions
- Arrays
- Strings
- vector
- set
- map
- Basic STL
Don't spend months learning the language before solving problems. Once you know the basics, start practicing.
2. Understand Time Complexity
Before learning advanced algorithms, learn how to estimate the complexity of your solution.
At least understand:
O(1)
O(log n)
O(n)
O(n log n)
O(n²)
Always look at the constraints before deciding your approach.
For example, an O(n²) solution may work for small n, but can be too slow when n becomes large.
This habit will become extremely important as you improve.
3. Start With Easy Problems
Don't start with difficult problems just because you want to improve quickly.
Start with simple implementation and beginner-rated problems.
Your goal in the beginning should not be:
"How quickly can I increase my rating?"
Instead:
"Can I understand the problem and solve it by myself?"
Try to build the habit:
Read → Think → Code → Submit → Debug → Learn
4. Learn Topics Step by Step
You don't need to learn every DSA topic at once.
A simple progression could be:
Basic Programming → Implementation → Sorting + Basic Math → Prefix Sum → Two Pointers → Binary Search → Greedy → Basic Data Structures → Graphs → Dynamic Programming
There are many possible roadmaps, so don't treat this order as a strict rule. The important thing is to build your skills gradually.
5. Participate in Contests
Don't wait until you become "good enough" to participate in contests.
Join contests while you're learning.
At first, you might solve only one or two problems. That's completely fine.
Contests teach you things that normal practice doesn't:
- Time management
- Reading problems quickly
- Choosing which problem to attempt
- Debugging under pressure
- Handling wrong submissions
Your rating may go down sometimes.
That's normal.
Rating is feedback, not your identity as a programmer.
6. Upsolve Your Unsolved Problems
This is probably one of the most important habits.
Suppose you couldn't solve Problem C during a contest.
Don't just move on.
After the contest:
- Try the problem again.
- Think about it without the contest pressure.
- If you're still stuck, read the editorial.
- Understand the main idea.
- Close the editorial.
- Implement the solution yourself.
This turns a failed contest problem into a learning opportunity. Upsolving is also a recurring recommendation in Codeforces roadmaps and beginner discussions.
7. Learn From Your Mistakes
WA, TLE and RE are part of Competitive Programming.
Instead of feeling bad about them, ask:
Why did my solution fail?
Maybe you:
- Missed an edge case
- Used the wrong data type
- Had an inefficient algorithm
- Misunderstood the statement
- Made an implementation mistake
If you understand the reason, the mistake becomes useful.
Final Advice
Don't try to learn everything at once.
Start small.
Solve problems regularly. Participate in contests. Upsolve your mistakes. Learn new techniques one at a time.
Most importantly, don't compare your progress with other people.
Everyone has a different starting point.
Your goal should simply be to become a little better than you were yesterday.
Learn → Practice → Contest → Fail → Upsolve → Improve
That's the journey.
