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How to prepare for ACM – ICPC?

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  • Difficulty Level : Hard
  • Last Updated : 01 Nov, 2022
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ACM ICPC(Association for Computing Machinery – International Collegiate Programming Contest) is a world-wide annual multi-tiered programming contest being organized for over thirteen years. The contest is sponsored by IBM. 

This article focuses on what all topics that are important for the competitive programming and should especially be studied in order to train yourself for upcoming ACM-ICPC contest. 

Rules of the Contest – World final Rules for 2021 Click here 

Indian Participants – Codechef conducts all the Indian Regionals. Click here to know about team formation, reimbursements etc 

ICPC for Schools by CodeChef – This competition serves as a gateway for the school students to participate in ACM ICPC contest along with ICPC college participants held across India. It is an idea conceived by CodeChef and supported by Amrita University. 

How to apply for ACM-ICPC: 

  1. Go to ICPC website (
  2. Create your personal contestant id, log in with the same and fill in all the necessary information.
  3. As you have to create a team with a mentor/coach from your college your coach should do the step 1&2 but as a coach.
  4. Now the coach have to go to the dashboard -> create a team.
  5. Now you have to choose which region you want to opt for.
  6. Then register all the contestants with the proper mail id which the team members registered on ICPC BAYLOR. Remember only a Team Coach can create the team.

A sample ICPC Problem : A usual ICPC problem has the following features: 

  1. Problem statement: describing the problem and what output is to be generated.
  2. Input: Make sure that you read this section with complete attention as missing out any minor detail may land you in wrong answer zone.
  3. Output: Just like above, this one also should be read carefully.
  4. Constraints: These can include constraints on input, time, memory, code size, etc.
  5. Time limit: See if your algorithm can work in this range. If not, time to change it!
  6. Memory limit: If you are fond of allocating memory for every small thing, it’s a good time that you changed it.

Preparing for ACM-ICPC

First and foremost Step: PRACTICE – Following are the resources that can be referred for practicing the ACM-ICPC alike contests and problems. For all these Online Judges, begin with the problems with maximum submissions and check other solutions to check how you may improve. Do Participate in their monthly contests to remain up to the mark. 


What to study?

Knowing just the basics of programming won’t be fruitful for aspirants of ACM ICPC. One needs to have a thorough knowledge of advanced algorithms used as well. Following Topics list out the necessary Topics and Algorithms that one must surely know to improve and stand a chance in the actual competition. 



Elementary data structures: To begin with competitive programming, one must master the Data Structures. Following is the list of most commonly used data structures: 

Advanced Data Structures 
Priority queues, union-find sets, (augmented) interval trees, (augmented) balanced BSTs and binary indexed trees 

More Advanced Data Structures. 

Sorting and Searching : Concentrate to learn the basic concepts and also get familiar with all the library functions available. 

String manipulation : Strings make programming problems interesting and difficult too and probably thats the reason they are used extensively in such contests. Learning library functions for String actually proves very helpful (C++ : See this and this, String in Java). 

Choosing the right Language : C++ is till date most preferred language followed by Java when it comes to programming contests but you should always choose a language you are comfortable with. Being CONFIDENT in any language is most important. 

Standard Template Library : A quintessential especially for those using C++ as a language for coding 

Dynamic Programming 

All DP Algorithms 


More articles on Backtracking 

Greedy Algorithms 

More articles on Greedy Algorithms 

Graph Algorithms : One of the most important topic which you can not ignore if preparing for ACM – ICPC. 

All Graph Algorithms 

Basic Mathematics

Arithmetic : Programmers must know how integers and real numbers are represented internally and should be able to code high-precision numbers. Bit manipulation tricks and knowing library functions for number basic arithmetic would be very helpful. 

Number theory : Knowing some of these concepts would save a lot of time and efforts while programming in the contests. 

Combinatorics : Although directly might not seem to be important, Combinatorics is important to estimate asymptotic complexity of algorithms. 

Geometrical Algorithms 

Network Flow Algorithms 

All Articles on Geometric Algorithms 

More Advanced Stuff

Bit Algorithms , Randomized Algorithms , Branch and Bound , Mathematical Algorithms , Heavy Light Decomposition, A* Search 

Informative Articles that you may like to read


Programming Camp Syllabus 

This article is contributed by Vishwesh Shrimali in association with Team GeeksforGeeks. If you like GeeksforGeeks and would like to contribute, you can also write an article and mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks. 

Please write comments if you find anything incorrect, missing or you want to share more information about the topic discussed above.

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