LeetCode 1203: Sort Items by Groups Respecting Dependencies Solution

Master LeetCode problem 1203 (Sort Items by Groups Respecting Dependencies), a hard challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

1203. Sort Items by Groups Respecting Dependencies

Hard

Depth-First Search Breadth-First Search Graph Topological Sort

Problem Explanation

Explanation:

To solve this problem, we can perform a topological sort within groups and across groups. First, we need to construct the directed graph based on the dependencies provided. Then, we can perform a topological sort within each group to determine the order of items within each group. After that, we can perform a topological sort across groups based on the group dependencies.

Step-by-Step Guide:

Create a directed graph using adjacency lists to represent the dependencies between items.
Create a group graph to represent the dependencies between groups.
Perform a topological sort within each group to determine the order of items within each group. Use Kahn's algorithm for topological sorting.
Perform a topological sort across groups based on the group dependencies.
Return the sorted list of items if a valid solution exists.

Time Complexity:

The time complexity of this algorithm is O(n + m) where n is the number of items and m is the number of groups.

Space Complexity:

The space complexity of this algorithm is O(n + m) for storing the graphs.

Solution Code

class Solution {
    public int[] sortItems(int n, int m, int[] group, List<List<Integer>> beforeItems) {
        // Java solution
        // Implementation in progress
    }
}

Try It Yourself

Loading code editor...

Frequently Asked Questions

How to solve LeetCode 1203 (Sort Items by Groups Respecting Dependencies)?

This page provides optimized solutions for LeetCode problem 1203 (Sort Items by Groups Respecting Dependencies) in Java, C++, and Python, along with a detailed explanation and an interactive code editor to test your code.

What is the time complexity of LeetCode 1203 (Sort Items by Groups Respecting Dependencies)?

The time complexity for LeetCode 1203 (Sort Items by Groups Respecting Dependencies) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.

Can I run code for LeetCode 1203 on DevExCode?

Yes, DevExCode provides an interactive code editor where you can write, test, and run your code for LeetCode 1203 in Java, C++, or Python.

Back to LeetCode Solutions