easyStackPattern: Stack
Validate Message Sequence Solution
Problem Statement
Given a sequence of message timestamps, determine if the messages are being sent in the correct order using a stack to track the messages. You are given an array of integers `timestamps` representing the sequence of message timestamps. Implement a function to verify that the messages are being sent in the correct order.
Examples
Example 1:
Input:[1, 2, 3, 4, 5]
Output:true
Explanation: Messages are being sent in the correct order
Example 2:
Input:[5, 4, 3, 2, 1]
Output:false
Explanation: Messages are not being sent in the correct order
Constraints
- Valid tags must be in the format of '<tag></tag>' or '<tag><content></tag>'.
- Closing tags must match the opening tags.
- No duplicate or overlapping tags are allowed.
Time: O(n) Space: O(n)
Use a stack to verify the message order in O(n) time complexity
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