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Quick Summary

Implement a stateful class that tracks the current page and total pages.
Dynamically calculate a centered window of visible page numbers based on size constraints.
Render a formatted UI string with arrows and markers after each navigation action.

What This Tests

State management and pointer tracking
Fixed-size window calculation over a bounded range
Edge case handling for boundary clamping and even-length offsets
String construction and formatting logic

Common Patterns

Sliding Window

Simulation

Greedy

Test Cases

Input

Output

Expected