CSES Problem Set Solutions

In this article, we have compiled comprehensive, high-quality tutorials on the CSES Problem Set Solutions to assist you in understanding the problem set for learning algorithmic programming.

What is CSES Problem Set?

CSES Problem Set is a collection of competitive programming tasks hosted on the CSES website. These problems cover a wide range of topics in algorithms and data structures, providing a valuable resource for programmers to crack world-level programming contests like ACM-ICPC, Google Code Jam, IOI, and many more. Whether you are a beginner looking to practice coding or an experienced coder preparing for coding competitions, the CSES Problem Set offers a variety of set of challenges to test and enhance your programming abilities.

CSES Full Form:

Based on majority of user comments, the best matched full form of CSES in the context of competitive programming is “Code Submission Evaluation System.”

It is a collection of algorithmic programming problems available on the CSES (Code Submission Evaluation System) website. The platform is designed to help programmers practice and improve their skills in solving various algorithmic problems using the C++ programming language.

Types of CSES Problems:

As per CSES, we can distribute the CSES Problem Set into following types of problems:

• Introductory Problems
• Sorting and Searching
• Dynamic Programming
• Graph Algorithms
• Range Queries
• Tree Algorithms
• Mathematics
• String Algorithms
• Geometry
• Advanced Techniques
• Additional Problems

Let us deep dive into each type of Problem Set.

Introductory Problems in CSES Problem Set Solutions:

This section includes fundamental problems that serve as a great starting point for beginners. They cover essential concepts and techniques, making them ideal for building a strong foundation. The prerequisites are Basics of Arrays, Strings, Number Theory, Bit Manipulation, etc.

• Weird Algorithm
• Missing Number
• Repetitions
• Increasing Array
• Permutations
• Number Spiral
• Two Knights
• Two Sets
• Bit Strings
• Trailing Zeros
• Coin Piles
• Palindrome Reorder
• Gray Code
• Tower of Hanoi
• Creating Strings
• Apple Division
• Chessboard and Queens
• Digit Queries
• Grid Paths

Sorting and Searching based CSES Problem Solutions:

This section includes a range of difficulty levels and are great for practicing sorting, searching and related algorithms. The prerequisites are Linear Search, Binary Search, Binary Search on Answer, Sorting etc.

• Distinct Numbers
• Apartments
• Ferris Wheel
• Concert Tickets
• Restaurant Customers
• Movie Festival
• Sum of Two Values
• Maximum Subarray Sum
• Stick Lengths
• Missing Coin Sum
• Collecting Numbers
• Collecting Numbers II
• Playlist
• Towers
• Traffic Lights
• Josephus Problem I
• Josephus Problem II
• Nested Ranges Check
• Room Allocation
• Factory Machines
• Tasks and Deadlines
• Reading Books
• Sum of Three Values
• Sum of Four Values
• Nearest Smaller Values
• Subarray Sums I
• Subarray Sums II
• Subarray Divisibility
• Subarray Distinct Values
• Array Division
• Sliding Window Cost
• Movie Festival II
• Maximum Subarray Sum II

Dynamic Programming based CSES Problem Set Solutions:

This section focuses on problems that can be efficiently solved using dynamic programming techniques. DP is a powerful paradigm for solving optimization problems by breaking them down into smaller subproblems and reusing their solutions. The prerequisites are: Dynamic Programming, DP on grids, DP on Strings, DP on Subsequences, Partition DP etc.

• Dice Combinations
• Minimizing Coins
• Coin Combinations I
• Coin Combinations II
• Removing Digits
• Grid Paths
• Book Shop
• Array Description
• Counting Towers
• Edit Distance
• Rectangle Cutting
• Money Sums
• Removal Game
• Two Sets II
• Increasing Subsequence
• Projects
• Elevator Rides
• Counting Tilings
• Counting Numbers

Graph Algorithms based CSES Solution:

• Counting Rooms
• Labyrinth
• Building Roads
• Message Route
• Building Teams
• Round Trip
• Monsters
• Shortest Routes I
• Shortest Routes II
• High Score
• Flight Discount
• Cycle Finding
• Flight Routes
• Round Trip II
• Course Schedule
• Longest Flight Route
• Game Routes
• Investigation
• Planets Queries I
• Planets Queries II
• Planets Cycles
• Road Reparation
• Road Construction
• Flight Routes Check
• Planets and Kingdoms
• Giant Pizza
• Coin Collector
• Mail Delivery
• De Bruijn Sequence
• Teleporters Path
• Hamiltonian Flights
• Knight’s Tour
• Download Speed
• Police Chase
• School Dance
• Distinct Routes

Range Queries based CSES Solution:

This section covers a variety of problems involving range queries, which are fundamental to many algorithms and data structures. These problems span various domains such as arrays, strings, and trees, presenting a comprehensive set of challenges to hone your algorithmic skills.

• Static Range Sum Queries
• Static Range Minimum Queries
• Dynamic Range Sum Queries
• Dynamic Range Minimum Queries
• Range Xor Queries
• Range Update Queries
• Forest Queries
• Hotel Queries
• List Removals
• Salary Queries
• Prefix Sum Queries
• Pizzeria Queries
• Subarray Sum Queries
• Distinct Values Queries
• Increasing Array Queries
• Forest Queries II
• Range Updates and Sums
• Polynomial Queries
• Range Queries and Copies

Tree Algorithms based CSES Solution:

This section includes a range of difficulty levels and is great for practicing tree-related algorithms. The prerequisites are understanding basic tree concepts, tree traversal (pre-order, in-order, post-order), binary search trees, etc.

• Subordinates
• Tree Matching
• Tree Diameter
• Tree Distances I
• Tree Distances II
• Company Queries I
• Company Queries II
• Distance Queries
• Counting Paths
• Subtree Queries
• Path Queries
• Path Queries II
• Distinct Colors
• Finding a Centroid
• Fixed-Length Paths I
• Fixed-Length Paths II

Mathematics based CSES Solution:

This section offers a variety of mathematical problems focused on handling range queries efficiently. These problems cover diverse topics such as arithmetic, algebra, and calculus, presenting a comprehensive set of challenges to enhance your mathematical problem-solving skills.

• Josephus Queries
• Exponentiation
• Exponentiation II
• Counting Divisors
• Common Divisors
• Sum of Divisors
• Divisor Analysis
• Prime Multiples
• Counting Coprime Pairs
• Binomial Coefficients
• Creating Strings II
• Distributing Apples
• Christmas Party
• Bracket Sequences I
• Bracket Sequences II
• Counting Necklaces
• Counting Grids
• Fibonacci Numbers
• Throwing Dice
• Graph Paths I
• Graph Paths II
• Dice Probability
• Moving Robots
• Candy Lottery
• Inversion Probability
• Stick Game
• Nim Game I
• Nim Game II
• Stair Game
• Grundy’s Game
• Another Game

String Algorithms based CSES Solutions:

This section includes a variety of interesting string-related problems including palindrome-related problems, substring order, and more. The prerequisite is Pattern Searching.

• Word Combinations
• String Matching
• Finding Borders
• Finding Periods
• Minimal Rotation
• Longest Palindrome
• Required Substring
• Palindrome Queries
• Finding Patterns
• Counting Patterns
• Pattern Positions
• Distinct Substring
• Repeating Substring
• String Functions
• Substring Order I
• Substring Order II
• Substring Distribution

Geometry based CSES Problem Set Solutions:

This section includes geometry problems offer fascinating challenges that involve shapes, angles, and spatial relationships. The prerequisites are Shoelace formula, Euclidean distance, Basic Geometry for Competitive Programming, etc.

• Point Location Test
• Line Segment Intersection
• Polygon Area
• Point in Polygon
• Polygon Lattice Points
• Minimum Euclidean Distance
• Convex Hull

Advanced Techniques based CSES Problem Set Solution:

This section includes a variety of difficulty levels and is excellent for practicing advanced techniques problems based on the CSES Problem Set. Understanding the basic data structure and algorithm.

• Meet in the Middle
• Hamming Distance
• Beautiful Subgrids
• Reachable Nodes
• Reachability Queries
• Cut and Paste
• Substring Reversals
• Reversals and Sums
• Necessary Roads
• Necessary Cities
• Eulerian Subgraphs
• Monster Game I
• Monster Game II
• Subarray Squares
• Houses and Schools
• Knuth Division
• Apples and Bananas
• One Bit Positions
• Signal Processing
• New Roads Queries
• Dynamic Connectivity
• Parcel Delivery
• Task Assignment
• Distinct Routes II

Additional Problems based CSES Problem Set Solution:

This section includes a variety of difficulty levels and is excellent for practicing additional problems based on the CSES Problem Set. Understanding the basic data structure and algorithm.

• Shortest Subsequence
• Counting Bits
• Swap Game
• Prüfer Code
• Acyclic Graph Edges
• Strongly Connected Edges
• Even Outdegree Edges
• Multiplication Table
• Advertisement
• Special Substrings
• Permutation Inversions
• Maximum Xor Subarray
• Movie Festival Queries
• Chess Tournament
• Tree Traversals
• Network Renovation
• Graph Girth
• Intersection Points
• Inverse Inversions
• Monotone Subsequences
• String Reorder
• Stack Weights
• Pyramid Array
• Increasing Subsequence II
• String Removals
• Bit Inversions
• Xor Pyramid
• Writing Numbers
• String Transform
• Letter Pair Move Game
• Maximum Building I
• Sorting Methods
• Cyclic Array
• List of Sums
• Increasing Array II
• Food Division
• Bit Problem
• Swap Round Sorting
• Binary Subsequences
• Tree Isomorphism I
• Counting Sequences
• Critical Cities
• School Excursion
• Coin Grid
• Robot Path
• Programmers and Artists
• Course Schedule II
• Removing Digits II
• Coin Arrangement
• Counting Bishops
• Grid Puzzle I
• Grid Puzzle II
• Empty String
• Grid Paths
• Bit Substrings
• Reversal Sorting
• Counting Reorders
• Book Shop II
• Network Breakdown
• Visiting Cities
• Missing Coin Sum Queries
• Number Grid
• Maximum Building II
• Filling Trominos
• Stick Divisions
• Coding Company
• Flight Route Requests
• Two Stacks Sorting
• Tree Isomorphism II
• Forbidden Cities
• Area of Rectangles
• Grid Completion
• Creating Offices
• Permutations II
• Functional Graph Distribution
• New Flight Routes
• Grid Path Construction
• Grid Path Construction

Frequently Asked Questions on CSES Problems (FAQs):

Question 1: What is CSES Problem Set?

Answer: CSES Problem Set is a collection of competitive programming problems available on the CSES website for users to practice and improve their algorithmic problem-solving skills and to crack world level programming contests like ACM-ICPC, Google Code Jam, and many more.

Question 2: How can I submit my solutions to CSES problems?

Answer: You can submit your solutions to CSES problems by writing a program that solves the given problem and then submitting the code on the CSES website using their online judge system.

Question 3: Are there any programming languages restrictions on CSES?

Answer: CSES supports submissions in various programming languages such as C++, Java, Python, and more. You are free to choose the language you are comfortable with for solving the problems.

Question 4: Can I discuss CSES problems with others?

Answer: While you can discuss general problem-solving strategies and algorithms with others, it is recommended not to share or discuss specific solutions to CSES problems to maintain the integrity of the platform.

Question 5: How can I track my progress on CSES?

Answer: CSES allows users to create an account to track their progress, save problem submissions, and see statistics on problems solved. Creating an account can help you monitor your growth over time.

Question 6: How can I get started with CSES Problem Set as a beginner?

Answer: As a beginner, it is recommended to start with easier problems on CSES and gradually move towards more challenging ones as you gain experience and confidence in solving algorithmic problems.

Question 7: Are there any tutorials available for solving CSES problems?

Answer: Yes, GeeksforGeeks provides editorial solutions of the problems to help users understand different approaches to solving the given problems.

Question 8: Is it necessary to solve all problems on CSES?

Answer: It is not mandatory to solve all problems on CSES. Users can choose problems based on their difficulty level and interest to solve. The goal is to practice and improve your problem-solving skills.

Question 9: Can I use code snippets or templates while solving CSES problems?

Answer: Yes, you are allowed to use code snippets or templates while solving CSES problems. It is common practice to reuse common algorithms or data structures to solve different problems efficiently.