Leetcode Problem 1019. Next Greater Node In Linked List

1019. Next Greater Node In Linked List

Leetcode Solutions

Monotonic Stack Approach

  1. Initialize an empty stack to store indices of nodes and an empty list to store the answer.
  2. Traverse the linked list, using an index variable to keep track of the current node's position (1-indexed).
  3. For each node, while the stack is not empty and the current node's value is greater than the value at the index on the top of the stack: a. Pop the index from the stack. b. Update the answer list at the popped index with the current node's value.
  4. Push the current index onto the stack.
  5. Move to the next node in the list and increment the index.
  6. After the traversal, for any indices remaining in the stack, update the answer list at those indices with 0.
  7. Convert the answer list to an array and return it.
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Brute Force Approach

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