Geeksforgeeks

X

DAYS

:

HOUR

:

MINS

:

SEC

Error

Copied to Clipboard

Given a Directed Acyclic Graph (DAG) with V vertices and E edges, Find any Topological Sorting of that Graph.

**Example 1:**

Input:Output:1Explanation: The output 1 denotes that the order is valid. So, if you have, implemented your function correctly, then output would be 1 for all test cases. One possible Topological order for the graph is 3, 2, 1, 0.

**Example 2:**

Input:Output:1Explanation:The output 1 denotes that the order is valid. So, if you have, implemented your function correctly, then output would be 1 for all test cases. One possible Topological order for the graph is 5, 4, 2, 1, 3, 0.

**Your Task:**

You don't need to read input or print anything. Your task is to complete the function **topoSort()** which takes the integer V denoting the number of vertices and adjacency list as input parameters and returns an array consisting of a the vertices in Topological order. As there are multiple Topological orders possible, you may return any of them. If your returned topo sort is correct then console output will be 1 else 0.

**Expected Time Complexity:** O(V + E).

**Expected Auxiliary Space:** O(V).

**Constraints:**

2 ≤ V ≤ 10^{4}

1 ≤ E ≤ (N*(N-1))/2

We are replacing the old Disqus forum with the new Discussions section given below.

Click here to view old Disqus comments.

Click here to view old Disqus comments.

Login to report an issue on this page.

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

YesLoading...

Topological sort

...

Here is some troubleshooting advice:

- Reset the IDE using the second button on the top right corner.
- Avoid using static/global variables in your code as your code is tested against multiple test cases and these tend to retain their previous values.
- Passing the Sample/Custom Test cases does not guarantee the correctness of code. On submission, your code is tested against multiple test cases consisting of all possible corner cases and stress constraints.
- You can access the hints to get an idea about what is expected of you as well as the final solution code.
- You can view the solutions submitted by other users from the submission tab.

Here is some troubleshooting advice for contest problems

- Make sure you are not using ad-blockers.
- Disable browser extensions.
- We recommend using latest version of your browser for best experience.
- Avoid using static/global variables in coding problems as your code is tested against multiple test cases and these tend to retain their previous values.
- Passing the Sample/Custom Test cases in coding problems does not guarantee the correctness of code. On submission, your code is tested against multiple test cases consisting of all possible corner cases and stress constraints.