https://github.com/codenkoffee/csen301-finals
https://github.com/codenkoffee/csen301-finals
Last synced: 11 months ago
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- Host: GitHub
- URL: https://github.com/codenkoffee/csen301-finals
- Owner: CodeNKoffee
- Created: 2024-01-04T23:11:22.000Z (about 2 years ago)
- Default Branch: master
- Last Pushed: 2024-01-08T17:56:05.000Z (about 2 years ago)
- Last Synced: 2024-12-31T00:33:44.071Z (about 1 year ago)
- Language: Java
- Size: 14.6 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.MD
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README
# CSEN301 FINALS TRIVIA
## Clone a Linked List with next and Random Pointer
1. **Create a New Node for Each Original Node and Insert It Next to the Original Node:**
- The linked list has nodes, and each node has two pointers: `next` points to the next node, and `arbit` points to any node in the list.
- We want to create a clone of the linked list. To do this, we traverse the original linked list.
- For each original node, we create a new node with the same data, and we insert it next to the original node. So, the structure becomes original_node -> copy_node -> original_node -> copy_node -> ...
2. **Assign Random Pointers for the Copied Nodes:**
- Now, we need to set the `arbit` (random) pointers for the copied nodes.
- While traversing the list again, for each original node, if its `arbit` pointer is pointing to some node, we set the `arbit` pointer of its corresponding copy node to the corresponding copy node.
3. **Separate the Original and Copied Linked Lists:**
- The linked list now contains both original and copied nodes interleaved.
- We need to separate the original and copied nodes into two separate linked lists.
- We update the `next` pointers of the original and copied nodes accordingly.
Here's a step-by-step explanation:
- **Step 1:**
```
Original: 1 -> 2 -> 3 -> 4
After Step 1: 1 -> 1' -> 2 -> 2' -> 3 -> 3' -> 4 -> 4'
```
- **Step 2:**
```
Original: 1 -> 2 -> 3 -> 4
After Step 2: Set arbit pointers for copied nodes
```
- **Step 3:**
```
Original: 1 -> 2 -> 3 -> 4
Copied: 1' -> 2' -> 3' -> 4'
After Step 3: Separate the original and copied linked lists
```
The final result is a cloned linked list with both `next` and `arbit` pointers, created in O(N) time complexity.
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