Given a linked list, the task is to find the sum of all the odd frequency nodes from the given linked list.
Input: 8 -> 8 -> 1 -> 4 -> 1 -> 2 -> 8 -> NULL
freq(8) = 3
freq(1) = 2
freq(4) = 1
freq(2) = 1
8, 4 and 2 appear odd number of times and (8 * 3) + (4 * 1) + (2 * 1) = 30
Input: 6 -> 2 -> 2 -> 6 -> 2 -> 1 -> NULL
Approach: This problem can be solved by hashing,
- Create a hash to store the frequencies of the nodes.
- Traverse the Linked List and update the frequencies of the nodes in the hash variable.
- Now, traverse the linked list again and for every node that appears odd number of times, add it’s value to the running sum.
Below is the implementation of the above approach:
- Splitting starting N nodes into new Circular Linked List while preserving the old nodes
- Append odd position nodes in reverse at the end of even positioned nodes in a Linked List
- Construct a Maximum Sum Linked List out of two Sorted Linked Lists having some Common nodes
- Delete N nodes after M nodes of a linked list
- Count minimum frequency elements in a linked list
- Linked List Sum of Nodes Between 0s
- Find sum of even and odd nodes in a linked list
- Sum of the nodes of a Circular Linked List
- Sum of the nodes of a Singly Linked List
- Sum and Product of all the nodes which are less than K in the linked list
- Sum of the alternate nodes of linked list
- Linked List Product of Nodes Between 0s
- Segregate even and odd nodes in a Linked List
- Find the sum of last n nodes of the given Linked List
- Sum of all distinct nodes in a linked list
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Improved By : andrew1234