Python Coding Practice

Solve Sort a linked list of 0s, 1s and 2s using Python Language

Solve Sort a linked list of 0s, 1s and 2s using Python to enhance your skills with python coding practice , master coding concepts, and prepare for interviews with practical exercises and detailed solutions.

Sort a linked list of 0s, 1s and 2s

Difficulty : Easy

Categories :

  • Linked lists

Given a linked list containing only values 0, 1, and 2, sort it such that all 0s appear at the beginning, followed by all 1s, and then all 2s at the end. Maintain the relative order within each group.

Constraints:

  • 1 ≤ linked list size ≤ 106
  • node->data ∈ {0, 1, 2}

Examples:

Input: LinkedList = 1->2->2->1->2->0->2->2
Output: 0->1->1->2->2->2->2->2
Explanation: After sorting, 0 appears first, followed by 1s, and then all 2s.
Input: LinkedList = 2->2->0->1
Output: 0->1->2->2
Explanation: Single 0 comes first, followed by single 1, and then two 2s.

Note:

Can you solve it in a single pass through the linked list?

Problem Solving

Input

What You'll Find Here

Interactive Exercises Practice coding with problems designed for beginners and experts.

Step-by-Step Solutions Understand every step of the solution process.

Real-World Scenarios Apply your skills to real-world problems and boost your confidence.

Choose from the following categories

Arrays A collection of elements stored in contiguous memory locations, allowing efficient random access and manipulation.

Linked Lists A linear data structure where each element (node) points to the next, offering dynamic memory allocation and efficient insertions/deletions.

Trees A hierarchical data structure with nodes connected by edges, used in applications like databases, file systems, and parsing.

Graphs A collection of nodes (vertices) connected by edges, representing relationships, widely used in networking, routing, and social networks.

Dynamic Programming An optimization technique that solves problems by breaking them into overlapping subproblems and storing their results.

Backtracking A problem-solving method that explores all possibilities recursively, backtracking when a solution is not feasible.

Sorting Algorithms Techniques for arranging elements in a specific order, such as quicksort, mergesort, and bubble sort, essential for data organization.

Searching Algorithms Methods for finding elements in a dataset, such as binary search, linear search, and graph traversal techniques.

Mathematics A field of study involving numbers, calculations, and logical reasoning, forming the foundation for algorithms and problem-solving.

Recursion A programming technique where a function calls itself to solve smaller instances of the same problem, often used in divide-and-conquer approaches.

Bit Manipulation Operations performed directly on binary representations of data, used for efficient computations and optimization tasks.